Henry’s fingers cramped, a stubborn reminder of a day spent grading examinations. He sat at a small kitchen table that wobbled whenever he applied too much pressure to his fork. The apartment smelled faintly of boiled cabbage and the metallic tang of the radiator. Outside the window, a streetlamp flickered, casting a rhythmic, sickly yellow pulse against the brickwork of the building across the way.

Henry lived a life measured in increments of forty-five minutes. His schedule was a rigid grid: first period, second period, lunch, third period, fourth period, and the long, slow walk home. He taught history, specifically the history of municipal infrastructure, a subject that guaranteed a glazed look in the eyes of every sixteen-year-old in the district. He didn’t mind. He preferred the predictability of pipes, roads, and zoning laws to the volatile whims of people.

One Tuesday, a letter arrived. It wasn’t in a standard envelope. It was a heavy, cream-colored card folded in three, sealed with a piece of plain gray tape. There was no return address. The front simply said: Section 4, Row J.

Henry set the card next to his cold tea. He didn’t know a Section 4. The city was divided into wards, not sections. He assumed it was a misdirected advertisement for a stadium event or perhaps a theater performance he had no intention of attending. He threw it into the wicker wastebasket and went to bed.

The next morning, the card was on his kitchen table again.

He stared at it while the kettle whistled. He was certain he had discarded it. He lived alone. No one had a key except the landlord, a man named Mr. Henderson who was far too busy arguing with the water company to break into apartments to move junk mail. Henry picked up the card, walked to the trash, and saw the first card still sitting at the bottom of the bin, nestled under a crumpled napkin.

Now there were two.

“Internal clerical error,” Henry muttered to the empty room. He took both cards, shoved them into his briefcase, and headed to the school.

The day proceeded with its usual friction. The students complained about the lack of excitement in the 1894 Sewage Act. Henry stood at the chalkboard, his back to the class, drawing a diagram of a filtration system. When he turned around to ask a question, every student was holding a cream-colored card.

They weren’t reading them. They weren’t even looking at them. The cards were simply resting on their desks, or being used as bookmarks, or being twirled between nervous fingers.

“Where did you get those?” Henry asked, his voice cracking slightly.

A girl in the front row, whose name was Brenda, looked down at her desk. “Get what, Mr. Vance?”

“The cards. The cream cards.”

Brenda looked at the empty space on her desk where Henry clearly saw the heavy paper. “I don’t have a card, Mr. Vance. Are we starting the quiz early?”

Henry rubbed his eyes. The cards were gone. The desks held only notebooks, pens, and a few stray gum wrappers. He finished the lesson in a daze, the chalk snapping in his hand.

He skipped his usual walk home and took the bus. He wanted to be around people, even if they were strangers. He sat in the back, watching the back of the driver’s head. As the bus jolted over a pothole, the man sitting across from Henry leaned over. He was wearing a drab wool coat and smelled like peppermint.

“You’re late,” the man said.

“I beg your pardon?” Henry replied, clutching his briefcase.

“Section 4. Row J. You’re missing the intake.”

The man stood up as the bus pulled to a stop. He didn’t exit through the door. He walked straight toward the side of the bus and, before Henry could shout a warning, he seemed to simply step through the metal paneling as if it were a curtain.

Henry scrambled off at the next stop. He wasn’t near his apartment. He was in a part of the city he didn’t recognize—a grid of tall, windowless buildings made of dark, polished stone. There were no signs, no streetlights, and no people.

He walked down the center of the road. His footsteps were flat and heavy. After three blocks, he saw a doorway. Above it, carved into the stone, was a large ‘4’.

He pushed the door open. It wasn’t a theater. It wasn’t a stadium. It was a vast, open floor filled with thousands of metal filing cabinets. They stretched upward so high that the tops were lost in the gloom of the ceiling.

A woman in a gray suit stood behind a small podium. She was holding a hole punch.

“Name?” she asked without looking up.

“Henry Vance. I think there’s been a mistake. I keep seeing these cards—”

“Vance, Henry,” she interrupted, flipping through a ledger that wasn’t a ledger at all, but a stack of perforated cards. “You’re supposed to be on sorting. You’re three hours behind. Row J is that way.”

She pointed a thin finger toward the interior of the room. Henry felt a strange pressure in his chest, a mechanical urge to comply. He walked past the podium.

Row J was a long aisle of cabinets. Each drawer was labeled with a year and a coordinate. He stopped at a drawer labeled 1922: 41.8781° N, 87.6298° W.

He pulled the drawer open. Inside were thousands of small, glass slides. He picked one up and held it to the light. It wasn’t a photo. It was a moving loop of a man crossing a street. The man tripped, dropped his hat, picked it up, and kept walking. Over and over, the man tripped and recovered his hat.

“What is this place?” Henry asked.

A man at the next cabinet, who was busy filing slides with a pair of silver tweezers, didn’t look up. “This is the Registry of Minor Deviations. We ensure the loops stay closed.”

“I don’t understand,” Henry said. “I’m a teacher. I teach history.”

“You teach the result,” the man said. “We manage the process. That man on your slide? If he doesn’t trip, he catches a bus he’s supposed to miss. If he catches that bus, he meets a woman he’s not supposed to marry. If they marry, the 1954 census in Ward 3 is off by six people. The infrastructure can’t handle six extra people, Henry. The pipes burst.”

Henry looked at the slide again. The man tripped. The hat fell.

“I don’t want to do this,” Henry said.

“You’ve been doing it for years,” the woman from the podium said, appearing behind him. “You just reached the end of your primary cycle. Your memory of the floor resets every twenty years to prevent fatigue. It’s time for the new cycle to begin.”

She reached out and touched the back of Henry’s neck.

Henry blinked. He was sitting at his kitchen table. Red ink stained the pads of his fingers. He looked at the stack of examinations in front of him. He felt a slight ache in his neck, but he dismissed it as the result of poor posture.

He picked up his pen and marked a large ‘X’ through a student’s incorrect answer regarding the placement of water mains in 1910. He felt a strange sense of satisfaction. Everything had its place. Everything followed a design.

He reached for his tea, but his hand brushed against a heavy, cream-colored card.

He picked it up. Section 4, Row J.

He frowned. He didn’t remember putting it there. He looked at the wicker wastebasket. It was empty. He looked at the card again. The ink on the card was still wet. It was the same shade of red that was on his fingers.

He stood up and walked to the window. The streetlamp was still flickering. He watched a man walking down the sidewalk across the street. The man was wearing a hat.

Henry waited.

The man tripped. His hat fell to the pavement. The man paused, picked up the hat, dusted it off, and continued walking.

Henry went back to his table and sat down. He took a fresh examination paper from the stack. He didn’t look at the name on the top. He simply began to grade. He worked with a speed and precision that felt less like a habit and more like a calibration.

At 10:00 PM, he put his pen down. He stacked the papers neatly. He stood up, turned off the kitchen light, and walked toward his bedroom.

He stopped at the door. He felt a sudden, sharp desire to go back to the table and look at the card again. He wanted to see if the coordinates on the back had changed. He wanted to know if Row J was still his assignment.

He stayed where he was. He didn’t move. He counted the beats of his own heart, matching them to the flicker of the streetlamp outside.

He stayed in the doorway until the sun began to press against the blinds. He didn’t sleep. He didn’t dream. He simply waited for the grid of his day to begin again.

When the alarm finally rang at 6:30 AM, Henry was already dressed. He picked up his briefcase, checked to ensure his grading pen was full of red ink, and walked out the door. He didn’t look at the kitchen table. He didn’t look for the card.

He arrived at the school early. He walked to the chalkboard and picked up a piece of white chalk. He began to draw the layout of the city’s power grid as it existed in 1935. He drew the lines thick and straight. He didn’t make any mistakes.

The students filed in. They sat in their assigned seats. Brenda was in the front row. She opened her notebook.

“Today,” Henry said, his voice flat and steady, “we will discuss the importance of maintenance. We will discuss why things must remain exactly as they were intended.”

Brenda raised her hand. “Mr. Vance? You have ink on your face.”

Henry reached up and touched his cheek. His fingers came away red. He looked at the stain. It was shaped like a small, perforated square.

“It’s just a mark,” Henry said. “Open your books to page eighty-four.”

He turned back to the board and continued to draw. He didn’t stop until the lines covered the entire green surface, a map of connections that led nowhere but back to themselves.