The first week, James thought he was sleepwalking.
That was how he made the first nights bearable. He lost sleep and misplaced hours, and his dreams left residue without shape. He would wake with the feeling that someone had been speaking near his ear from very far away. Twice he found a small dent in the pillow beside his head, round and shallow, the kind a cat leaves, and he owned no cat. He would sit up, listening, and hear only the house settling around him.
The mornings left evidence on him. Carpet fibers pasted to his tongue. Brick dust under three fingernails. A red grit between his molars that made the sink water bloom pink when he spat. His jaw ached as if his mouth had been opened wider than it was built to open and held there until something finished using it.
The first explanations were logical and merciful: stress, a new house, too much coffee after dinner. James had known about sleepwalkers the way everyone does, through other people's stories and warnings about waking them too suddenly. He had never been one. Nearly fifty years without incident felt like evidence of something. He bought a camera, pointed it at the bedroom door, and ran it overnight. By morning the laptop was dead, screen black, and it would not wake. He left it on the charger and forgot about the footage until his phone buzzed three days later with a cloud sync notification. He almost ignored it. Three hours of darkness, then twelve seconds of static so dense it looked like snow pressed against glass, then nothing. The laptop never turned on again. He had no way to run the test a second time, and he was not sure he wanted to.
The dreams started that same week, quieter and more deliberate than nightmares. He would wake with the physical certainty of having moved through the house in the night, of having spoken, of having sat at his desk with great calm and done things he could not name. They felt less like dreams than memories of someone using his body carefully. He told himself they were dreams. Then he began checking.
The first thing he found was an email draft. He had never left an email unfinished in his life. This one had no subject, no recipient, three paragraphs copied from his manuscript and cut apart until the sentences accused each other. He sat with it for a long time before closing it. Then he opened the sent folder. Then the trash. In the trash he found a message to his department chair asking whether a body could be considered evidence if the witness did not remain inside it. He deleted it with both hands shaking, then emptied the trash, because the folder would have held it for thirty more days. Another draft contained only the subject line: below. He did not open the ones after that. He had stopped wanting to know what he was capable of saying in the night.
The second thing was his feet. He had gone to bed clean. He woke with the soles of his feet the color of the basement floor. He stood in the bathroom looking at them for a long time. Then he went to the top of the basement stairs and found the door already open. A chair from the basement lay on its side in the hallway, as though it had been carried up and dropped. He did not go down. He closed the door, washed his feet, and went back to bed, because routine was the one defense he had left.
He began leaving tests for himself. A glass of water centered on the bedside table. A strip of masking tape across the bedroom door, his slippers placed toe to wall so any movement would have to declare itself. A key tied with a short length of string laid flat on the hallway floor. A book wedged against the base of the basement door. In the morning the tape was unbroken. The slippers stood neatly beside the basement door instead of the bedroom. The key had been moved, its string trailing differently than he had left it. The book had been pushed aside, and a fine scatter of brick dust traced the arc of the door's swing. The glass was empty, a faint ring of brick dust circling the bottom as if someone had used it, washed it badly, and returned it to the exact place he had left it. James photographed each one. Then he stared at the photographs until his eyes watered and the details stopped meaning anything.
He began to suspect that the basement was the source. The dust came from there. The chair had come from there. Every morning his body had been oriented toward it, drawn back to it, returned to it. He had circled that conclusion for weeks, and now he let himself land on it.
He locked the basement door and put the key in a mug above the refrigerator.
In the morning the door was still locked, but the key lay on the kitchen table with a thread from his pajama cuff caught in its teeth. He wedged a book against the threshold. The next day the book remained in place and a line of brick dust crossed the floor on the other side of it. Each precaution failed in a different way. A single failure might have been forgetfulness. This many, each one different, looked like someone paying attention.
He put the key back in the mug, turned the mug's handle toward the wall, and wrote the time on a sticky note beside it. In the morning the handle still faced the wall. The note was where he had left it.
The locked door held for a while. A week passed without incident. Then two. James began sleeping past six, started answering emails the same day they arrived, returned a call from his cousin without rehearsing what to say. He did not let himself believe it was over. He stopped waiting for it to continue.
Then he woke on the basement floor.
The door he had locked was open above him. His knees were folded beneath him, body arranged with a care that did not belong to sleep, facing the corner behind the water heater. The heat sat close around him, patient and damp, smelling faintly of metal and old plaster. He did not remember leaving his bed. He did not remember descending the narrow brick stair. He remembered only waking already placed, as if someone had set him down and stepped back to admire the position.
The first morning he crawled upstairs before his knees would accept weight. He showered in water too hot for comfort and watched gray grit gather near the drain. The mug above the refrigerator was empty. The key stood in the lock on the basement side of the door.
The second morning he found his pillow on the basement floor beside him, folded once with domestic care. That detail frightened him more than the brick dust. Violence would have been simpler. Someone had folded the pillow the way he folded it himself, corner to corner, and he had no memory of doing it.
On the third morning he woke with his forehead pressed so firmly to the concrete that a red oval remained there until noon. He covered it with his hair and taught a seminar by video with the camera tilted high.
On the fourth night he surfaced before it finished.
His hands were moving. His spine bent. His forehead lowered toward the floor. His mouth shaped syllables that scraped his throat raw. He did not know the words. He knew only that his body knew what came next. The motion had begun to feel practiced and familiar, close to comfortable. He tried to stop his hands and they finished the movement anyway, pressing flat to the concrete beside his face, fingers spread toward the corner.
He stayed on the basement floor until morning, knees throbbing, throat burning, watching the dark slowly become brick. Each night the shape came easier. His knees found the floor faster, and his forehead knew where to go. When the light came he looked at his hands. Brick dust was packed under every nail, and in the mortar behind the water heater, at the height of his reach, ran ten fresh scratches.