On the second Saturday of October the sky over Marenna Bay was the color of clean glass, and Sienna Hale woke at five in the morning with the distinct conviction that she was about to be sick.

She was not. She lay in the dark of her flat on Calloway Street, counting the cracks in the ceiling plaster, and let the feeling pass through her like a wave through a hull. In four. Hold. Out for six. Then she got up, filled the kettle, tested the water with a paper strip out of habit, and stood at the window in her nightshirt watching the first trams crawl up the hill through the pearl-gray dawn.

A year ago, almost to the week, she would have called this the happiest day of her life. A year ago, in another life, she had been twenty-six years old and had walked into a cathedral with her father's hand shaking on her arm and two hundred and twelve strangers turning to stare, and she had thought, with the exhausted calm of a woman resigned to her fate: well, at least it's only one night.

It had been exactly that.

The kettle clicked off. She poured her tea and did not drink it.

Nell arrived at seven with a garment bag over one arm and a cake tin in the other, and the face of a woman who had been awake since four and had not quite forgiven herself for it.

"Don't look at me," Nell said, shouldering through the door. "Mum made the cake. I'm only the mule. She says if you don't eat a slice before noon she'll come to the registry herself and put it in your mouth."

"Tell her I'll test it."

"Test it?" Nell set the tin on the table and stared at her. "Hale, it's lemon. It's my mother's lemon cake. It has been in this family since the war."

"I test everything this week."

"You test everything every week." But she said it gently, and when she turned to unzip the garment bag her hands were not steady. "I'm only saying, I've known you six years, and you've never once told me you were seeing anyone. And now there's a marriage on a Saturday and a man I've never met, and you say it's a practical arrangement, and you won't tell me what that means." She lifted out a dress and held it up against the morning light. "So I'm going to ask you once, and then I'll shut up. Are you sure?"

Sienna looked at the dress.

It was cream-colored, plain, cut to the knee, with a high round neck and a narrow waist and sleeves that ended at the elbow. She had found it three weeks ago on a rack at a second-hand shop on Calloway Street, and Nell's mother, who had once been a seamstress for the opera, had taken it in at the seams without being asked. There was no lace. There was no train. It was the dress of a woman going to sign a document.

"I'm sure about the contract," she said at last. It was the most honest thing she could say. "I'm still learning about the man."

Nell's mouth quirked. "You look like someone going to a lab accident."

"That's about right."

"Well." Nell shook out the skirt and held it open. "Let's at least get you into it in a state to survive one."

The Registry Office stood on Gull Square at the top of a flight of eight white steps, a dignified old building with a copper roof gone green and a pair of stone lions that had lost their noses to the weather. The square was full of pigeons. A flower seller had set up beside the fountain, and a boy was chasing a hoop in the gutter. It was nine forty-five, and the whole bright, ordinary, indifferent city went about its Saturday as though nothing was happening.

Her father was waiting on the steps in his one good suit.

Edmund Hale had shaved so closely that he had cut himself twice, and there were small pieces of tissue still stuck to his jaw. He stood very straight, with his hat in his hands, and when he saw her coming across the square on Nell's arm he took off his glasses, wiped them on his sleeve, and put them back on, as if the first look had not been enough.

"Oh, Sienna," he said.

"Don't, Dad. You'll start me."

"I'm not going to say a word." He put his hat on, took it off again, and held out his arm. His eyes were bright and wet. "I won't say I'm giving you away, either. I'd like that understood. I'm only walking beside you."

She took his arm. Under the wool of the sleeve it was solid and warm and trembling slightly, and she realized, with a rush of tenderness so sharp that it startled her, that of all the people in the world who had ever failed her, he had at least never pretended otherwise.

"That's better," she said. "That's much better."

The ceremony room was small and high and full of light, with tall windows and a polished floor and rows of cane chairs, perhaps a dozen, arranged to face a table covered in green baize. A bowl of white chrysanthemums sat on the table. Sienna had said no flowers. Someone had decided that chrysanthemums were not flowers but merely decoration, and she let it pass.

There were not many people. Dario Vance sat in the front row, silver and immaculate in a dove-gray suit, one leg crossed gracefully over the other, with a white carnation in his buttonhole. Beside him, Helena Roux in dark navy, composed, gray-eyed, with her hands folded on her lap. Marco stood at the side wall like a monolith. And at the front, at the foot of the baize table, with his back to her, stood a man in a black suit, alone, his shoulders very straight.

He turned.

Sienna had prepared for many things. She had told herself over breakfast and in the mirror and on the walk up the steps that she would feel nothing. It was a contract. It was a legal formality. She would walk to the table, speak a few lines, sign a book, and go back out into the sun. She had told herself that so many times that she had almost believed it.

Then Matteo Bellandi looked at her, and the whole speech went out of her head like a candle in a draft.

He did not smile. He did not move. He stood still at the end of the aisle with his hands at his sides and looked at her as a man looks at something he had stopped believing in. His lips had parted a little. His eyes, those dark steady eyes, had gone very wide and very bright, and she saw them move over her, slowly, from the plain cream dress to the dark braid on her shoulder, to her face, and back again, as if he were learning her by heart. It was not hunger, and it was not triumph. It was something much simpler and much harder to bear. It was a man seeing, for the first time, someone alive in a white dress.

She understood in a flash. The last time he had seen her in white, she had been lying on a ruined rug with a cold hand in his.

The breath went out of her chest.

The registrar coughed.

It was a small, polite, practiced cough from a small, polite, practiced man in a gray waistcoat, who had been standing behind the baize table for some time with a leather-bound book open in front of him. Registrar Pollard was a man who had married four thousand couples and had never once been caught looking at his watch.

"Shall we begin?" he said gently, to nobody in particular.

Matteo seemed to wake. A faint color touched his cheekbones. He cleared his throat and held out his hand, palm up, an old-fashioned courtesy, and Sienna, her father's arm slipping away from her own, crossed the polished floor and put her fingers in his.

His hand was cold.

It was not the cold of fear. It was the cold of someone who has been standing in a room for an hour, willing himself not to move. His fingers closed around hers with enormous care, as if she were made of glass, and she felt the fine, hard tremor under the skin. He did not look away from her face.

The registrar read the words of the law. They were brief, dry, and without poetry: that marriage was the voluntary union of two persons, that no one present knew of any lawful impediment, that the parties had come of their own free will. Sienna heard none of it. She heard the pounding of her own pulse and the faint sound of a pigeon on the sill and the careful, held-in breath of the man beside her.

"Mr. Bellandi," said the registrar. "If you would repeat after me."

Matteo's voice was low and steady until the third word.

"I, Matteo Bellandi," he said, "take you..."

He stopped.

It was only for a second. His eyes were fixed on hers, and she saw something happen in them that she had not seen even at the table with the dying man, in the corridor with the model ships. For a moment, the whole elaborate architecture of the man gave way, and what was beneath it was only a person with an unbearable weight of feeling, trying not to be crushed.

"Sienna Hale," he said, and his voice cracked on her name. He cleared his throat. He tried again. "Sienna Hale, to be my wife."

"To have and to hold," the registrar prompted.

"To have and to hold." His fingers tightened. "From this day."

There was a faint rustle in the front row. Somebody drew a breath. Her father, standing at the wall, made a quiet sound into his folded handkerchief.

It was Sienna's turn. She had memorized her lines. She had practiced them in the mirror, flat, neutral, businesslike. She opened her mouth to say them, and found that she was looking into the face of a man who had just said her name as if it were the only word he knew.

"I, Sienna Hale, take you, Matteo Bellandi," she said, "to be my husband."

She had meant it to come out briskly. It did not. It came out low, and unsteady, and much too soft.

Something in his face broke. Not outwardly. There was no tear, no tremor of the mouth. But the relief that moved behind his eyes was so vast and so sudden, so like a man setting down a pack he had carried across a continent, that she felt it in her own chest. She had seen that look once before, on a pier at sunset, when she had said the word marriage. She had thought then it was triumph.

It was not triumph. It was the look of someone who had been afraid, for a very long time, that she would never say it.

"The rings," said the registrar.

They had not discussed rings. It was not in the contract. Sienna had thought of it, briefly, on the tram, and decided that she would say nothing and wear none. Now she watched Marco step forward from the wall with a small dark box in his large hand and hold it out to Matteo with a look of grave and complete neutrality.

Matteo opened it.

Inside, on a bed of gray velvet, lay a single thin gold band. It was plain, without stones, without engraving, the kind of ring that could have been bought in any jeweler's window. He took it between two fingers. He turned to her, and held out his other hand for hers.

She gave it to him. He lifted the ring.

His hand was shaking. It was a fine, fast, helpless tremor, so visible that it made the little band tick against his thumbnail, and she saw him see it, and saw him set his jaw. He steadied his wrist with his other hand, as he had steadied the pen in the long bright room, and slid the ring over her knuckle with a slowness that was almost reverent.

It stopped at the base of her finger. It fit.

It fit exactly. Not like a ring that had been sized to her hand, but like a ring that had worn a place for itself there. She felt the weight of it settle, the particular gentle drag of thin gold against a knuckle, and the hair rose along her arms. She had turned a ring like this a thousand times, round and round, in a bridal suite at the top of a hill. She knew the weight of it the way she knew the weight of her own pulse.

It is nothing, she told herself fiercely. A plain band. There are ten thousand like it.

She looked up into his face, and he was watching her, very carefully, to see what she would do.

She did not say a word. She held out her own shaking hand for the ring Marco passed her, a heavier band of dull gold, and slid it onto his finger. It went on easily. His hand turned over under hers, and for one second, only one, his fingers closed on her own and held on.

"By the authority vested in me," said Registrar Pollard, closing his book with a soft thump, "I pronounce you married. You may sign the register."

There was no kiss. There had been no provision for one in the contract, and neither of them had asked. Matteo looked at her, for a long moment, with something she could not read, and then he inclined his head and gave her his arm instead. She took it. His sleeve was warm. The whole room began to move.

Nell and Marco signed as witnesses, one after the other, with the same grave concentration, and Edmund Hale blew his nose so loudly that a pigeon flew up from the window. Dario Vance rose and kissed Sienna's hand and said something warm and graceful about the dawn of a new chapter. Helena offered a cool, correct congratulation and a cooler hand. Sienna said thank you to everyone. She did not hear a single word that she said.

Only one thing stayed with her as they went down the white steps into the sunlit square, with the pigeons exploding upward from the stones and the fountain flashing in the light. It was the weight on her left hand. And the voice of a man who had said, in a room full of strangers, to have and to hold, from this day, and had meant every word of it as though it had been a vow to something other than the law.

The reception was held on the terrace of the villa, under an awning striped in blue and cream, at a long table laid for ten.

Sienna had taken charge of the drinks.

She had done it three weeks ago, in the first flush of fury at her own recklessness. On a sunny Tuesday, she had walked into a wine merchant's on Calloway Street, bought two bottles of champagne off the back shelf, still sealed under their original foil, and carried them home in her own bag. They had sat in the back of her refrigerator ever since, behind the cheese. She had carried them to the villa this morning in a canvas satchel, and she set them on the sideboard in the dining room with a certain grim ceremony, in plain view of the kitchen staff, who, thanks to clause five, had been told to expect it.

"Miss Hale?" said the young man in the white jacket, hesitantly. "I'm to bring the Bellandi reserve, ma'am. Mr. Vance's orders."

"Thank you. We'll have my bottles first."

He did not argue. She saw the housekeeper, a stout woman in gray, give a small, grim nod of approval from the pantry door, and suspected that the whole household had understood more than she had told them.

When the guests had gathered on the terrace, with the whole glittering bay laid out below and the lemon trees heavy with fruit, she carried the first bottle out herself. She set it on the table in front of everyone. She peeled the foil with her own thumbnail. She eased out the cork, and caught the soft sigh of the gas in a napkin, and poured every glass with her own hand: ten pale-gold flutes, one after another, along the length of the cloth.

"Forgive me," she said, with a bright, brittle smile. "A professional habit."

She dipped a paper strip into the first glass, then the second. She watched it stay pale yellow.

Nell, at the end of the table, was mouthing something at her. It might have been you are a lunatic. It might have been I love you. Sienna could not tell.

"Very prudent," said Dario, with a rich, delighted laugh. "My dear, I'd drink poison from your hand if you told me it was wine. But let nobody say a Bellandi bride isn't careful."

A ripple of laughter. Sienna smiled until her face ached.

Matteo had said nothing. He stood at the head of the table with his untouched glass in his hand, watching her with an expression so still, so absorbed, that she felt it on her skin like sunlight. When she tested the last glass and found it clean, she saw the faint, hard line of his shoulders ease, a fraction, as though he, too, had been waiting for the strip to stay pale.

"A toast," said Dario, rising.

He was brief. He spoke of beginnings and of courage, and of how an old man was permitted, at such moments, to be foolish and to be grateful. His eyes were warm. His voice was a cello. He raised his glass to the bride and to the groom and to the house, and every flute lifted, and the sun struck the bubbles and turned them to gold.

Sienna drank.

It was dry and cold and faintly sweet. It tasted of nothing but champagne. She held it in her mouth for a moment longer than she needed to, searching for a coin, a metallic bloom, a warning thread at the back of the tongue. She found nothing. She swallowed, and waited, and felt her fingertips. They were warm. They were only warm.

Her heart was going so hard she thought it must show through the cream dress.

It was clean. She had tested it herself. She had opened the bottle with her own hand, and no one in the world had touched it first. There was nothing in it. There could not be anything in it. And still every cell in her body stood braced against the next sip as though against a blow.

A hand touched her wrist.

It was very light. It rested there, warm and dry, for no more than a heartbeat. When she turned her head, Matteo was beside her, looking not at her but out at the sea, his face composed. Only his thumb moved, once, over the inside of her wrist, where the pulse beat hardest. Then it was gone.

"It's clean," he said under his breath. "You made sure."

She closed her eyes for a second. When she opened them, her fingers had stopped trembling.

The afternoon went on. A cold luncheon was served, every dish tested under the napkin, and nobody seemed to find it odd any longer. Nell's mother's cake was cut and handed round, and Sienna tested the first slice and ate it in four bites, and the lemon was so sharp and so sweet that for a moment she forgot she was afraid of anything. Edmund Hale, flushed and wet-eyed, told the long story of the marine supply shop to Marco, who listened with grave attention. Nell danced with the young man in the white jacket on the flagstones, to music from a wind-up gramophone that someone had found in the pantry. Helena watched it all from the end of the table with her gray eyes unreadable and her glass untouched.

It was nearly five when Dario produced the gift.

It came in a long box of dark blue leather, tied with a silver ribbon. He set it on the table with a flourish, and the guests turned, and Sienna, with a certain weary dread, undid the bow. Inside, nested in white satin, lay a pair of crystal champagne flutes.

They were exquisite. Tall and slender, with a spiral of tiny diamond-cut facets climbing the stem, and a band of etched leaves at the rim.

Sienna stopped breathing.

She knew them. She would have known them in the dark. She had held one in her hand on a September night in the top room of this very house, with the lamplight turning the champagne to gold. She had watched it slip out of her fingers and roll across a Persian rug. The spiral of the stem. The band of leaves.

"The Bellandi wedding flutes," said Dario, beaming. "Made for the first Matteo's bride, a hundred and forty years ago. Every bride of the house has drunk from them. I took the liberty of having them cleaned. I thought it only fitting."

The terrace had gone quiet. She could feel Matteo, beside her, go still, still the way a cat goes still when the wind changes.

Then he reached out, calmly, and closed the lid of the box.

"That is very generous, Dario," he said. "Thank you. But Sienna prefers to drink from her own glasses. I'm sure she'll want to keep these somewhere safe."

He lifted the box and handed it over his shoulder, without looking, to the young man in the white jacket. "The glass cabinet in the library. Lock it."

"Of course." Dario's smile did not alter by so much as a line. He inclined his head with courtly grace. "Of course. How thoughtless of me. A bride should choose her own."

Sienna said, "Thank you, Dario. It's a lovely thought," and heard her own voice from a great way off, and thought: Lock it. Lock it and lose the key.

And at the end of the table, a pair of cool gray eyes watched Matteo's hand, and then the box, and then the closed lid, with a very faint, thoughtful line between the brows.

The guests left as the sun went down. They went in twos and threes, with kisses and handshakes and the soft mutter of engines on the gravel. Nell crushed Sienna against her in the hall, said you are an absolute idiot, I love you, call me tomorrow, and climbed into her mother's borrowed car with her braids coming down. Her father embraced her hard, and she had to tell him twice that she would be perfectly all right. Dario kissed her cheek. Helena took her hand and held it a moment, and said, in a voice pitched very low, "Be careful, Sienna," and was gone before Sienna could answer.

Then the great doors closed, and the house was quiet, and she was alone in a hall of black and white marble with the man she had married.

He was standing at the foot of the staircase. He had taken off his jacket at some point during the afternoon, and his sleeves were rolled to the elbow, and the lamplight caught the gold of the ring on his left hand. He looked at her across the long empty floor. She thought he would speak. He only lifted one hand, palm up, and nodded toward the stair.

"I'll show you," he said.

They went up in silence. He walked half a pace behind her, as he had on the night of the dinner, with his hands clasped at his back. The staircase curved up through shadows. On the second landing, a tall window looked out over the dark garden. On the third, a long corridor ran away into the east wing, hung with old maps of the harbor in gilt frames. She did not look at them. She was looking at the last door at the far end, and she knew it long before they reached it.

It was a dark wood door with a brass handle. It was the same door. She would have known the grain of it anywhere.

Matteo stopped a pace short of it and stood aside.

"This is the east suite," he said. His voice was very low. "I had it made ready for you. The lock is new. It's a steel-cored door, with a bolt on the inside. There's a single key, and it's in the lock. I don't have a copy. Marco doesn't have a copy. Nobody in this house has one." He paused. "I'd like you to know that before you open it."

She put her hand on the brass. It was cold. She turned the handle, and the door swung inward without a sound.

The room was dark. She found the switch by the jamb, and a lamp bloomed on the far side, soft and amber, and she stood on the threshold and looked.

The bed was in the same place. The vanity, the balcony doors, the long curtains. But the room had been changed. The walls were a pale green she had never seen. A writing desk stood by the window, with a green-shaded lamp and a blotter and a row of empty notebooks. A shelf held a rank of books, and a small glass vial with a paper label sat on the highest, and when she crossed the carpet she saw, in her own teenage capitals: SALT.

She turned around slowly. Her father had kept it on a shelf in her old room on Tern Street. She had not noticed it was gone.

And on the wall by the window, where the sideboard had been, where a silver bucket had once sat sweating in the warm air with a white ribbon tied about its neck, there was nothing at all. Only a bare stretch of pale green wall and a few inches of lighter wallpaper where something large had stood and been taken away.

She looked at that blank space for a long time.

"Where's the sideboard?" she said.

He did not answer at once. She heard him draw a breath, in the corridor behind her, careful and slow. When he spoke, his voice was even.

"There isn't one," he said. "I thought you'd have no use for it."

She did not turn. She stood with her back to him and her hand pressed flat against her sternum, and she let the silence stretch, giving him every chance to say more. He said nothing. He did not step across the threshold. He did not so much as shift his feet.

"Sienna." He said it very gently. "I'm not going to come in. I want you to understand that. Tonight nothing will happen except that you'll wake up tomorrow morning. That's all. That is everything I ask."

She closed her eyes. She heard in his words, as clearly as in any confession, the thing he would not say. She had thought, a little, that he might try to come in. She had braced for it, the way she braced for everything. She had never once imagined that he would stand in the corridor of the house where they had died, and ask nothing of her but the morning.

"Thank you," she said. Her voice was barely there.

"Goodnight, Sienna."

"Goodnight, Matteo."

She heard him step back. She heard his footsteps move away down the long corridor, slow and even, until they faded on the stair.

She closed the door.

The bolt was heavy and well oiled, and slid home under her thumb with a soft, solid sound. She stood with her palm flat against the dark wood and her forehead nearly touching it, in the amber lamplight, in the green quiet of a room that had been remade for her by a man who knew exactly what it had held.

She knew, clearly, that he did not have a key. She knew that she could unbolt this door whenever she chose, and that no one on the other side could force it. For the first time in two lives, a door was hers.

She turned the lock anyway.

But it was not because she was afraid of what he would do. It was because she wanted, for the very first time, to be the one who decided whether it opened.