The thing about being told to stop was that Seoha had never, in his whole life, been any good at it.

He woke on the sixth day with a crick in his neck and a pile of quilts on top of him that he had no memory of arranging. He was lying on the swept path in the middle of the east corridor, with a lantern burning above him on a beam, gone to a thin yellow glow in the gray dawn. The air in the hall was strange. It was not warm, exactly, but it was no longer the hostile, listening cold he had gotten used to. It was merely cold, the ordinary, honest cold of a mountain house in winter, and someone had made sure of it.

He lay there for a while, staring at the lantern, and tried to piece together the night. He remembered the kitchen. He remembered the sound of a voice saying everything warm that I have ever touched has died, in a tone so flat and so broken that it had followed him into the hall like a draft. He remembered lying down on the floor because his legs would no longer hold him up, and a long, shuddering darkness, and, somewhere in it, a pair of silver eyes and a hoarse voice saying that he had never left.

I never left.

Seoha put his hands over his face, and for a minute or two he just breathed.

It was easy to dismiss. It had been a fever dream. Men in the grip of the cold said and saw all kinds of things. But there were the quilts, a heap of them, smelling of old cedar and frost, stacked so carefully over his shoulders that not a draft could have crept in. And there was the lantern, lit by hand, hung from a beam where no ordinary person could have reached it without a stool. And there was a little ring of green growing around his left wrist, a bracelet of new clover, which, when he turned his arm over, he found was bent very slightly away from the wall, as though it had been trying all night to lean toward someone who was sitting six paces off.

He sat up slowly, and looked at the corner across the hall.

The boards there were furred with a faint white rime. A rime that was not the same as the rime on the rest of the floor, because it lay in a shape. It was the outline of a man, seated, with his back to the wall and his knees drawn up. It had been laid down in a perfect, silent print, as if someone had sat there all night, motionless, and the cold in the wood had remembered.

Seoha did not say anything. There was nobody to say it to.

He folded the quilts, one by one, and took them back to the room he had borrowed, and put the lantern out. Then he washed his face in the basin by the door, with water that was almost warm, and looked at himself in the cloudy brass of the mirror for rather longer than he usually allowed. He looked tired. He looked like a boy who had been chewed on by something and spat out. But there was a faint color in his cheeks, and his eyes, he noticed with a shock, were not afraid.

I'll try not to be warm, he had said. It had been meant as a blow. He understood now that it had also been a promise, and that he intended to keep it as far as he was able. He was not going to use the fever. Not on the stove, not on the walls, not on the roof. He was going to find another way to be useful.

It took him most of the day to find it.

He started with the shed, because sheds were where the useful things lived. It was a lean-to behind the well, and it held more than he had expected. Stacked kindling, much of it split with astonishing neatness. A rack of old iron tools, the handles worn to the shape of a single hand. Three sacks of barley, one half-eaten, two untouched, all of it dry. A crate of dried mountain roots. A string of dried mushrooms so old they had turned to dust and rattled like beads. In the far corner, hanging from a nail, a bundle of something gray-green that smelled sharply of resin, which he recognized, after a moment, as pine tips, bundled for tea. A person had once cared for this larder. A person had cured and dried and tied things off with neat knots, and then at some point had stopped.

He took what he could carry, and set to work.

He lit the stove with flint and tinder, and it took him half an hour, and burned his thumb. He rinsed the barley and put it on to soak. He scrubbed the great iron pot until his arms ached. He chopped mountain roots, which fought him at every cut, and a handful of the old pickled greens, which he rinsed three times to take off the worst of the taste, and he hung the pine tips in a cloth over the pot to steep. He swept the kitchen floor. He found a ladle. He was, for several hours, unreasonably happy.

It was while he was stirring the pot that he remembered the notches.

He kept the calendar in his pocket, a strip of birch bark he had carried from Cheongha, notched along one edge with a small knife. One notch for every day. He had cut it before he left, counting forty-two to the equinox, and every night since, he had added a mark and a small cross, and counted what was left. He took it out now, and held it up to the firelight, and counted again.

The bark said thirty-nine.

He counted a second time. He counted a third time, on his fingers. Thirty-nine. That was right. That was exactly what the strip of bark said, and what any reasonable person with a knife would conclude. Thirty-nine days until the equinox, and he had time.

But something was wrong. It sat in him like a cold stone. He put the bark down and closed his eyes and listened to his own body, the way he would listen to a field before planting, and the answer that came up was different. The fever had a rhythm, he had learned. It rose and fell. But the rises were getting taller, and the falls shorter, and the whole heated beat of it had begun to quicken, as though something at the far end of the road were drawing it in faster than the calendar could keep pace. He could feel it, a slow tightening, like a rope being hauled in.

Thirty-four, said the rope.

He opened his eyes. His hands were trembling on the ladle. Six days had gone by, and by the fever's reckoning, he had lost seven. Whatever was coming for him was not waiting politely for the equinox.

He put the bark back in his pocket. He did not mark the cross.

He carried water in from the well in the middle of the afternoon, and the walk took him across the courtyard, past the long dark rectangles of the empty beds. He did not stop. He kept his eyes ahead and his hands wrapped around the handle of the bucket, as one passes a person one has quarreled with. But at the corner of the last bed his boot struck a hard knob under the snow, and he looked down, in spite of himself, and saw the edge of a pink petal, preserved in the ice like an insect in amber, left over from the disaster on the roof. Someone had not swept it away. Someone, he realized, had gone around it, leaving a careful half-circle of clean stone on either side.

He did not know what to do with that, so he did nothing, and carried the bucket in.

"Dinner," he said, out loud, to the pot, in a voice that was almost steady. "Dinner is the thing. One thing at a time."

The bell in the Gate Hall tolled the hour of the evening meal.

He had not planned to lay the table. He had planned, in fact, to leave the pot on the stove and go quietly to bed, and not to think about whether a second bowl would be eaten or not. But his hands, apparently, had their own opinions. He had already taken down two bowls and set them on the low table in the little room off the kitchen, with two pairs of chopsticks, and two cups of pine-tip tea, and a candle in a saucer. He stood back and looked at them for some time.

"It's fine," he said. "It's a perfectly nice table."

It had been four nights since he had last set one. He did not expect anything. It was a point of pride with him not to expect anything. He ladled out two bowls of the barley and root stew, and the steam rose in the cold air, fragrant and plain, and he sat on the cushion on the east side, and folded his hands in his lap, and waited. The candle burned. His stomach growled. He ignored it.

The door slid open.

He did not look up at once. He could not. He was suddenly absorbed in the pattern of the wood on the table, and the faint, comfortable crackle of the candle, and the very small sound of someone standing in a doorway, not coming in.

"The bell rang," said the Sentinel.

"I heard it."

"You said, at the hour of the bell."

"I did." Seoha looked up.

The Sentinel stood just inside the threshold, with one hand still resting on the frame. He had put on a clean outer robe, white, high-collared, with thin silver embroidery at the cuffs, and his long hair was tied back more carefully than usual. His face was as composed as a mask. But the frost along the doorframe had crept out a hand's breadth beyond his fingers, and his breath came in small, controlled clouds, and he looked, for all his stillness, like a man who had walked a very long way to stand at a very small door.

"Come in," Seoha said. "Please. It's not much."

For a long moment, the Sentinel did not move. Then he crossed the room, soundlessly, and lowered himself onto the cushion across from Seoha, folding his legs with a stiff, slow grace, as if he had forgotten the movement and had to recover it joint by joint. He sat very straight. He looked at the bowl in front of him, at the pale steam rising from it, with an expression of grave, wary attention, as one might regard a small animal that has wandered in out of the snow.

Neither of them spoke. The candle hissed.

It was ridiculous, Seoha thought. It was the most ridiculous thing he had ever seen. A man who was three hundred years old, or so the old women said, who could freeze a waterfall with one hand, was sitting at a low table in a drafty room, staring at a bowl of barley as if it might bite.

Frost had begun to creep along the rim of the Sentinel's bowl. It formed a thin white lace around the edge of the stew, crystalline and delicate, and the broth beneath it stilled. The steam stopped. Seoha, without thinking, put both his hands around his own bowl, then reached across the table and took the Sentinel's bowl, cupping it between his palms. He did not use the fever. He had promised himself that. But a person's hands carry a certain warmth just by being hands, and his, since the flood, carried more than most.

"Here," he said, very quietly. "Wait. Let it warm."

He held the bowl for about ten heartbeats. The lace of frost thinned, and dissolved, and the broth began to steam again. He slid it back across the table, slowly, until it sat in front of the Sentinel. The edges of their fingers did not quite meet on the rim. A very small gap of cold air, no more than the breadth of a grain of rice, stayed between them. Seoha could feel it. He was fairly sure the Sentinel could too.

The Sentinel took up the chopsticks. His hands, Seoha saw, were not quite steady.

He lifted a mouthful of barley, and looked at it for a moment, as if deciding whether it was real, and ate.

Seoha did not breathe.

The Sentinel chewed, slowly. He swallowed. A long pause followed, in which the wind outside rattled the shutters and the candle guttered and somewhere in the roof an icicle let go with a small, clear snap. The expression on his face did not change by so much as a flicker.

"There is no salt," he said.

It was said gravely, with the dispassion of a magistrate reading the verdict. Seoha stared at him. His mouth twitched. He pressed his lips together, and the corner of his eye crinkled, and a strangled little noise escaped his nose, and then it all came apart. He laughed. He could not help it. He put his forehead down on the table and laughed until his ribs hurt, and the candle flame shook, and outside the window a small snow-laden branch, startled, shook itself free.

"I know," he gasped. "I know, I'm sorry, I looked everywhere, there's no salt in the whole shrine, I found a jar and it was, it had a, a ghost in it, it's the most terrible soup I have ever made."

"It is not terrible."

"It is. It's bad. It's a bowl of warm sadness."

"It is," said the Sentinel carefully, "very hot."

That set him off again. Seoha wiped his eyes with the back of his wrist, and looked up, still grinning, and saw that the corner of the Sentinel's mouth had moved. It was not a smile. It was a small fold at the edge of the lip, a hairline of an expression, gone almost before it formed, but it had been there. Frost dissolved on the window beside them in a sudden clear patch, and for a moment, the glass showed the black sky and a handful of stars.

They both looked at it. Then they both looked away.

"What do you do all day?" Seoha asked, because the silence had begun to feel breakable and he could not bear to let it. "When you're not walking the lines. I'd like to know. I'm nosy."

"I walk."

"That's the morning."

"I listen."

"To what?"

The Sentinel considered the question with a gravity that made it seem larger than it was. "To whether anything has changed."

"And has it?"

The pause that followed was so long that Seoha thought he would not answer. The candle flame leaned and straightened. The gray eyes, which had been resting on the chopsticks, lifted at last to his face, and held there, and for a moment there was something naked in them, quickly veiled, like a figure glimpsed through a window and then drawn behind a curtain.

"Yes," said the Sentinel quietly. "Something has."

He did not say what. Seoha did not ask. He had the strong impression that if he did, the whole fragile evening would crack down the middle like river ice, and so he said nothing, and nodded, and passed the pickled greens, which were refused with a small formal shake of the head, and the two of them went on eating in a silence that was somehow no longer empty.

"The salt," said the Sentinel, to the table. "It ran out the winter after the Gate was sealed."

Seoha stopped smiling. "Three hundred years ago?"

"Yes."

"And you never"

"I did not ask for more." The silver eyes rose, briefly, and fell again. "There was nothing to taste. It seemed unnecessary."

It was a plain statement, without self-pity, and it landed in the room like a dropped bowl. Seoha opened his mouth, and shut it, and found that he had nothing at all to say. He looked at the man across the table, at the thin, straight shoulders, at the barley he was eating, slowly, mouthful by mouthful, with the deliberate attention of someone relearning a lost language, and a great, quiet ache opened in his chest, so large that it frightened him.

"Well," he said at last, in a voice that came out rougher than he intended. "That's an easy thing to fix."

The Sentinel did not answer. He ate. He finished the bowl, every grain of it, and set down the chopsticks, side by side, and sat looking at them. Outside, the wind rose and fell. A drop of water slid down the inside of the window, and with a faint sound, like a sigh, froze halfway.

"The trader comes tomorrow," he said.

"Mun Gyeol? He comes up the ridge?"

"Once a month. He leaves provisions at the second line." The Sentinel's eyes were on the empty bowl. "I will ask for salt."

He rose in a single smooth motion, and stood for an instant, looking down at Seoha from his great pale height. There was a question in his face, and something else behind it, softer and harder to read. Then he inclined his head, a small, formal bow, such as one might give to a host.

"Thank you for the meal," he said.

He left. The door slid shut behind him. The candle burned on.

Seoha sat without moving for a very long time. His bowl had gone cold. His hands had begun to tingle, the way they always did when the fever was thinking of waking, but it was a gentle sort of tingle, a hum rather than a roar, like the first note of a song he almost knew. He realized he was still smiling. It made his face hurt.

He ate his own soup, which was lukewarm and bland and bitter, and found that it was the best thing he had eaten in months.

Afterward he cleared the table by candlelight. There were the two bowls, and the two cups, and the two pairs of chopsticks. And there was, beside the Sentinel's cushion, a single spoon that neither of them had touched, which had been lying all evening on its folded cloth at the edge of the table. Seoha picked it up to put it away, and stopped.

The spoon was covered in frost.

It was a very particular frost, fine and clear, laid over the silver in intricate branching lines, and as he turned it in the candlelight he saw that it was not random at all. It had arranged itself, with a patience that took his breath away, into the shape of a small, perfect, five-petaled flower. A peach blossom, or a plum, no larger than the nail of his smallest finger, drawn in glittering ice at the center of the bowl of the spoon.

He stood very still, holding it, while somewhere in the dark corridors of the shrine a man walked away from him in silence, and the whole mountain seemed to hold its breath.