Seoha woke up warm, and for several confused seconds he could not work out what was wrong with that.

Nothing hurt. That was the first thing. He lay on his back in an unfamiliar bed under a stack of quilts that smelled of cedar and old dust, and every part of him was accounted for, fingers, toes, the tip of his nose. His body felt scraped hollow, like a gourd cleaned out for a lamp, but it was a living hollow. The fever had gone quiet. The pressure behind his ribs had eased to something he could almost call a hum. Somewhere nearby, wood was popping softly in a hearth.

He turned his head. There was a hearth. A small fire burned in it, steady and honest, and in front of it, on the stone, a single iron kettle sat steaming. The room was long and narrow, with paper screens along one wall gone the color of weak tea, and a low table in one corner stacked with a folded gray cloak that was certainly not his.

Then he looked at the floor, and remembered.

The ring of green around the bed had spread. Sometime in the night it had grown into a small meadow, soft grass and clover and a drift of white starflowers that climbed one bedpost and spilled over the edge of the mattress. A tendril of vine had wound itself around the leg of the low table and bloomed, quite unrepentantly, into two violet trumpets. The yellow flower in the wall had multiplied. It framed the window like a garland.

"Oh, you idiot," Seoha whispered, to his hands, or to the room, or to the person he had been before the flood. "You absolute idiot."

He sat up. The quilts slid off him, and he discovered he was wearing his own tunic still, though someone had taken off his boots and set them neatly by the door. His wrappings lay folded beside the pillow. He had no memory of that. He had no memory of anything after a pale hand, hanging in the air above his own, trembling in a way no hand that cold should have been able to tremble.

He pushed his hair out of his eyes and thought, carefully: I am alive. I am inside. Someone lit a fire.

It was an extraordinary list. He did not trust it for a moment.

On the low table, beside the cloak, there was a bowl of something. He padded over on bare feet, and the grass tickled his soles, and he lifted the cover. Barley porridge, thin and gray, long gone cold. But a spoon lay beside it, and a cup of water had been set at his elbow, and the cup had frost on its rim, which meant someone had brought it in the night with hands that could not help freezing whatever they carried. He drank the water. It tasted like snow, and like being looked after.

He was halfway through the porridge, standing up, shoulders curled around the bowl like a stray, when it occurred to him to look out the window.

The window, once he pushed aside the garland of yellow flowers, showed him a world made of one color. White. White on the roof tiles, white in the courtyard, white on the stone lanterns, which were buried to their paper-shaded necks. The sky was a lid of the same pale gray, and out of it snow was still falling, thick and straight and silent, like flour from a sieve. Beyond the courtyard wall, where the road must have been, there was nothing. The pines had vanished. The pass had vanished. The whole mountain had been erased and replaced with a clean sheet.

He set the bowl down. His heart began to beat strangely.

He put his boots on and went out into the corridor.

The shrine, in daylight, was bigger than he had imagined and much quieter. Its long wooden halls ran off in three directions, their eaves heavy with icicles as thick as his arm, and every sound he made came back at him from far away. The floorboards were gray with age. Somebody had swept them. Somebody, he realized, swept them every day, and no one had walked on them for years, because the dust had been brushed aside in a perfect, cold, solitary path down the middle of the hall, wide enough for a single set of feet.

He followed it, one hand trailing along the wall. The grass around the guest room faded behind him. At the end of the corridor, a pair of wide doors stood slightly open to the courtyard, and a thin blade of daylight cut across the boards.

"The pass is closed."

Seoha stopped.

The voice came from somewhere to his left, from a shadow he had not noticed, deep in a recess where the corridor turned. It was low and rough and utterly flat, as if it were reading a notice aloud. A figure stepped out of the dark. The tall man from the pillar, in daylight, was somehow worse. In the storm, he had been a shape of silver and shadow, a vision. Now he was merely a man, real and cold and alarmingly beautiful, standing five paces away with his hands tucked in his sleeves and frost forming on the floor around his boots. His black hair was tied back at the nape, a few strands escaping. His face was pale as river ice, with a fine, straight nose and a mouth that looked as if it had forgotten how to smile. His eyes were the color of a winter sky just before snow.

He was looking at Seoha's feet. Seoha looked down. The corridor boards beneath him were wet, and between them, in the cracks, tiny shoots of grass had begun to push through.

"I'm sorry," said Seoha automatically. "That's, I'll stop. Or I'll try. Thank you for the fire. And the water. I'm, um." He swallowed. "Ryu Seoha. We met. Sort of. Before I passed out."

"I remember," said the man.

It was not an unfriendly statement. It was not a friendly one either. It simply sat there.

"What should I call you?" Seoha asked. It was the sort of question that, in Cheongha, he could have asked a stranger with a smile and a bit of nonsense about the weather. Here it came out thin.

"The Gate calls me Sentinel."

"That's a job. That's not a name."

The silence that followed was a very particular silence, and Seoha, who had been sent out of rooms in three villages, recognized it at once. It was the silence of a door being closed gently. He raised both hands in surrender. "All right. Sentinel. My lord Sentinel? Sentinel-nim?" He heard himself babbling and could not seem to stop. "It's very quiet here. Is it always this quiet? I thought there might be, you know. Other people. Monks. A small choir."

The Sentinel's mouth did something very faint at one corner, and then did not do it. "There is no choir."

"No. I see that." Seoha rubbed the back of his neck. "That's, ah. That's all right. I'm good with silence. I've had practice."

It was almost true. He tilted his head to look out of the open door, and the daylight caught the edge of the snow and made his eyes water. "How long?" he asked, more quietly. "The pass. How long does it stay shut?"

"Until the thaw."

"The thaw." Seoha felt a very small tilt in the world. "That's, that could be weeks. That could be two months."

"Yes."

"I only have six." He stopped himself, too late. Six weeks, he had been about to say, six weeks until the equinox, and then I turn into a flood. He swallowed the rest, and his mouth went dry. "I mean. I have things. In the valley. People who'll worry."

The Sentinel's gaze rested on him. It was a heavy, level gaze, and it did not blink. "No one will come for you up the mountain in Closing Winter."

"No," said Seoha. "I suppose they won't."

He had meant it as a joke. It came out as something else, and he saw the gray eyes narrow by the smallest degree, as though the man had heard what was under it and did not know what to do with it. They stood in the cold hall for a long, stretched moment, the stranger from the valley and the stranger from the mountain, and between them the floor was slowly greening.

Seoha felt it coming before it came.

He knew the signs too well. A prickle behind the eyes. A sudden thickness in the air, a pressure in his palms like a handful of coals. He had used all his strength in the storm, and the fever, which had slept through the night, was waking now, rested and hungry. He tucked his hands into his armpits, bent over, bit his lip, and thought: no, no, not here, not in front of him, not now.

It did no good. The heat broke out of him in a single, sweeping pulse. The floor beneath his feet gave way with a sound like a cracked egg. A thin green stem shot up through the boards, thick as a thumb, and in the space of a breath it uncurled into a tall flowering shrub, glossy-leafed and loaded with great red blooms. A camellia. A full-grown camellia, in the middle of the corridor, in a shrine at the top of a frozen mountain, its petals unfurling in slow, stunned silence.

"Control it," said the Sentinel.

It was not shouted. It was said in a very low, very quiet voice, and the temperature in the hall dropped so sharply that Seoha's breath turned to mist. Frost raced across the walls. Icicles on the eaves outside cracked in unison.

"I'm trying," said Seoha.

"Try harder."

"I am trying." His own voice shook, and anger rose in it, startling him with its heat. He had been polite for weeks. He had been small and quiet and sorry in front of people who had once known him by name, and the part of him that had held all that in for so long suddenly could not. "If I could do that, don't you think I would have? Don't you think I would have done it before a whole river came up and ate a barn? You think I like this? You think it's a game, a, a party trick, that I do on purpose, that I can just, just put away like a knife?"

He had never said so much to a stranger in his life.

"You are a spring-bearer," said the Sentinel slowly.

It was not a question, and it was said as a man might say the word for a plague, or a god. Seoha laughed, high and broken. "Is that what it's called? In the valley they say Thawborn. It sounds worse. I like yours better."

The man did not smile. But a muscle moved in his jaw, and the frost along the walls trembled, and Seoha could not tell if he was angry or frightened or something quite different. The cold in the room was enormous. It pressed on his chest. He could see the shapes of the man's breath in the air, thick as smoke, and see his hands, which were no longer tucked in his sleeves but hanging at his sides, bare and rigid, the long fingers curled as though they were holding something back.

On the floor, a thread of ice began to run toward the camellia.

It crept across the boards, a white line, ferny and fast. It reached the base of the shrub and crawled up the stem, and Seoha thought, with the bitter calm of a man watching a house fall: there it goes, another one. But the ice stopped. It stopped at the lowest leaf, a finger's width from the nearest petal, trembling, as though pulled by two strings at once. It did not touch the flower. After a long moment it withdrew, slowly, as a tide goes out, and the red bloom stayed as it was, unfrosted, burning faintly in the cold.

Seoha stared at it.

The Sentinel stared at it too. Then he turned his head, very deliberately, and looked at the wall instead.

"You may remain until the pass opens," he said, in a voice that had gone flat and careful again, as if he had put the rest of himself back in a drawer. "As a guest. There will be rules. I will tell them to you tomorrow."

"Tomorrow," Seoha echoed, bewildered.

"Today you will eat and rest." He paused. His eyes flicked, briefly, to the camellia. "And you will not break anything else."

He turned and walked away, down the long, swept path in the middle of the corridor, and the cold went with him, leaving a vacuum behind. Seoha stood where he was, holding his own elbows. The camellia nodded gently in a draft. After a moment he realized his knees were shaking, and sat down on the floor right there, in the grass that had grown through the boards, and put his forehead on his arms.

He had not been thrown out. He had not been told to leave. He had been told to eat and rest.

It was the kindest thing anyone had said to him in months, and it had been delivered like a sentence from a magistrate.

He got up eventually, because staying on the floor of a stranger's hall did not seem like good manners. He cleaned the grass off the corridor as best he could, plucking blades one at a time, ashamed, until he realized it only seemed to grow back faster when he felt guilty. He gave up and went to sit by the little fire in the guest room. The camellia, left behind in the hall, bloomed on.

By afternoon, restlessness had won over shame. He could not sit in one room and let someone else's kindness pile up around him like snow. In Cheongha, a guest who did nothing was a guest who would soon be an unwelcome one, and some old habit in him, older than the flood, insisted on being useful. So he wrapped himself in the gray cloak and went looking for the kitchen.

It was not hard to find. Cold led him there, a long draft that smelled of stone and ancient smoke. The kitchen was a low, vaulted room at the back of the east wing with a great black stove built into one wall and a row of iron hooks across the ceiling. Nothing hung from the hooks. The stove was stone cold and swept clean, and its mouth gaped at him like something that had given up waiting. He walked its length with one hand trailing over the counter. A single bowl on a shelf. A single cup. A single pair of chopsticks, laid together as precisely as a pair of knives.

He opened the cupboards one at a time, because he could not help it. A sack of barley, half full, kept dry by some effort. A string of dried mountain roots, shriveled like old fingers. A jar of pickled greens that must have been ten years old and smelled it. A crock of lamp oil. A row of small ceramic pots, each with a lid, each labeled in a faded and graceful hand, and each, he discovered, empty. Pepper. Dried chili. Sesame. At the end of the row stood the largest pot, with a spoon still resting in it, and when he lifted the lid it was empty too, with only a faint white crust at the bottom that crumbled against his fingertip. He touched it to his tongue before he thought better of it. Salt. The ghost of it, anyway.

He stood there for a long moment, holding the lid, thinking about what it meant for a house to run out of salt and go on running.

Nobody had cooked in this kitchen for a very long time. Somebody, he guessed, had eaten here anyway, in the plainest way possible, enough to be called alive. He remembered the single swept path down the middle of the corridor, and the folded cloak, and the cup with frost on its rim. A whole shrine, built for pilgrims and monks and whatever came after, and in the middle of it one man, living on barley and cold, tending a fire he did not need for a guest he did not want.

Seoha put the lid back, very gently, as if the pot could feel it.

Then, because he had nothing else to offer, he laid both palms against the great black stove, the way his mother had once taught him to coax a sulky hearth, and let a thread of warmth run out of his hands into the stone. Just a thread. Just a little. He kept his eyes shut and his jaw tight and counted slowly to thirty. The iron ticked and sighed. When he opened his eyes, a faint wavering heat was rising from the stove, and a little color had come back into the soot.

It cost him. He felt it at once, a draining chill that pulled up from his feet and settled in his chest, so that he had to sit down on the floor with his back against the stove and wait for his teeth to stop chattering. But the kitchen was a degree warmer. For the first time in his life, it occurred to him that the fever might be good for something besides disaster.

He stayed there until the light in the window turned blue. On his way back through the halls, he passed a pair of tall, narrow doors at the end of the north wing, sealed with a rime of ice so thick it had fused the two panels into one, and above them, carved deep into the lintel, a word he could not read. The carved characters were older than any he had learned in the village school. He stopped in front of them with his heart beating oddly, and put one hand out, and did not quite touch the ice.

Not the library, he thought. Too grand. Too closed. Too cold. But a place like this, with doors like these, had to hold something that was worth keeping closed.

He took his hand away, and went on.

There was something else he had to decide, and he turned it over for a long time that evening with the heat of the hearth on his face.

He had told the Sentinel nothing about the archive. He had said he was lost. It was a lie, but a small one, and in his experience small lies kept you alive. If this man knew that the foolish boy at his door had climbed a mountain in winter to read the shrine's oldest books, the guest's welcome might cool in an instant. Libraries were sacred. Books were the one thing that a guardian could not be expected to hand over to a stranger with a fever.

No. He would find them himself. He had six weeks, or something near it. He would be quiet, and careful, and good, and eat when told, and stay out of the way, and somewhere between the rules and the silence he would find the door that led to the books.

He took the folded gray cloak from the table, and put it around his shoulders, and fell asleep sitting up.

When he woke, the light was gone from the windows. It was deep night, blue and silent, and for a moment he did not know what had pulled him out of sleep. Then he heard it. Nothing. The shrine was so quiet that quiet itself had a sound.

He went to the window, and pushed the yellow flowers aside, and looked down into the courtyard.

The snow had stopped falling. The sky was clear, scattered with winter stars so hard and bright they looked cut from tin. The courtyard lay under a skin of blue light, and at its center, perfectly motionless, a figure stood with his back to the shrine.

The Sentinel had been there for a long time. Seoha could tell by the snow. It had settled on his shoulders and the crown of his head, a thin white mantle, and had not melted. He stood straight, silver sleeves drifting in no wind, facing the far end of the courtyard, where the ground rose to the dark mass of the Gate Hall and, beyond it, a faint pale glow that could only be the great arch of ice. He did not move. He did not seem to breathe. He might have been a statue left outside when the builders went home.

Seoha watched him for what felt like an hour. The Sentinel did not move once.

What are you guarding? he thought. It was a foolish thought, a little frightening, and he tried to put it down. But the question stayed in the cold glass of the window, and in the hollow of his own chest, long after he had lain down again and pulled the gray cloak up over his head.