Seventeen-year-old Adam and his fearless friend Maja break into a sealed Warsaw tenement room and find a machine that tears them out of the present and into another era.
Warsaw still held the heat of June after sunset. It clung to the cracked pavement, the tram lines, the facades of buildings that looked tired but refused to fall. Adam stood at the entrance to a neglected tenement in the centre of the city and stared up at its grimy windows. Behind the glass, the past seemed to be waiting.
He would never have come here on his own. Maja had dragged him along, as usual, with that dangerous mix of confidence and curiosity that made it impossible to tell whether she was brilliant or reckless until it was too late.
"You heard what Witek said," she murmured, already halfway through the doorway. "Top floor. A room nobody has opened in decades."
Adam followed, though every instinct told him to turn around. The staircase groaned under their shoes. The railing was cold and slick with old paint, and the air smelled of dust, damp plaster, and something faintly metallic, as if the building had been storing its own secrets for years.
He checked his watch. 7:13 p.m.
That ordinary detail made the place feel even stranger. Outside, people were probably buying ice cream, arguing at tram stops, scrolling through their phones. Here, every step sounded like an intrusion.
Maja moved ahead of him, quick and silent, pausing only to glance back with a grin that dared him to keep up. "You always act like the city is about to bite you," she whispered.
"Because sometimes it does," Adam said.
She rolled her eyes and kept climbing.
By the third floor, the corridor had narrowed until the walls seemed to lean inward. At the far end stood a single door that looked wrong among the others: heavier, older, reinforced with dark metal fittings that had rusted into the wood. No number. No fresh paint. Just a long, stubborn silence around it.
Maja stopped. Even she seemed to hesitate for a second.
Then Adam reached past her and tried the handle.
The door gave way at once with a dry, protesting creak.
Inside, the room was dim and airless. A blade of evening light slipped through a filthy window, revealing a layer of dust so thick it dulled everything beneath it. Yet the room was not empty. In the centre stood an object that made Adam forget to breathe.
It was too large to be a clock and too intricate to be a piece of furniture. Brass pipes curved into a frame of dark metal. Rows of levers jutted from its sides. Small dials crowded the surface beside flickering numbers that shifted as if they couldn't decide where to settle. It looked like a machine built by someone who had understood the shape of time and hated it.
Maja stepped closer, her voice dropping to a breathless whisper. "What is that?"
Adam walked around it slowly. On one panel, a date had been engraved so sharply the metal still caught the light: 1944.
Something in his chest tightened.
"Maja," he said, more sharply than he meant to. "Don't touch anything."
But she was already studying the controls, her fingers hovering over a thick lever at the side. It was wide enough that two hands would barely fit around it.
"You can't tell me you're not curious," she said.
He was curious. That was the problem. The machine felt less like an abandoned object and more like a question waiting for the wrong answer.
"I'm serious," he said. "We should leave."
Maja gave him a sideways look, half amused and half thrilled. "You came all the way up here for a closed door and you're quitting now?"
Before he could answer, she gripped the lever and pulled.
For a heartbeat, nothing happened.
Then the room lurched.
The numbers on the panel spun wildly. The glass in the window flashed white, then black. A low vibration rose through the floorboards, so deep it felt less like a sound than a pressure inside Adam's bones. The air snapped cold. Dust lifted off the floor in a sudden spinning cloud.
Adam staggered back and caught the edge of the machine. Maja's face had gone pale.
"Adam..."
The lights died.
A heavy pulse thudded through the room again, louder this time, and the machine answered with a harsh metallic whine. The walls blurred. The window vanished into a streak of green and grey and then into nothing at all. Adam grabbed for Maja, but the floor seemed to tilt away beneath them.
Then the room tore apart.
Wind slammed into him. His stomach dropped so violently he thought he might be sick. The darkness burst open into noise, voices, boots, shouting, the crack of something being hit against stone. Adam hit the ground hard, his palms scraping against rough cobblestones.
He blinked against a sudden wash of daylight.
He was no longer in the tenement.
He was in a courtyard he had never seen before, ringed by worn walls and crowded with men in old uniforms. Rifles pointed in every direction. A truck idled nearby, coughing smoke into the air. The uniforms, the weapons, the faces, the tension in the square of stone around him all belonged to another time entirely.
And then a voice snapped out behind him, sharp with alarm.
"Who are you? Where did you come from?"
Adam turned.
A boy about his age, with a cropped haircut and a rifle aimed straight at his chest, was staring at him as if he were the impossible thing in the courtyard.
Behind them, a siren began to rise.