Three students notice a classroom that appears on the timetable only after school hours. When they find the door, the room inside is already waiting for them.
S. Lem School had a way of making every rumour sound half true. Older students joked that the corridors shifted at night and that some staircases led places the building had never been meant to hold. Karolina never laughed at those stories. By Friday afternoon, after maths, biology, and a day full of slammed doors and half-heard whispers, she was no longer sure she wanted to.
Something was off in the school.
Teachers were hurrying through the corridors with notebooks clutched to their chests, their faces tight and pale. The principal had locked himself in his office and, through the glass in the door, Karolina could see the light of his monitor flickering across the wall. Even the usual noise from the lower floor sounded wrong, as if the building were listening to itself.
Lena caught up with her near the notice board, hair still damp from the rain outside. Wiktor arrived a second later, hands in his pockets, trying too hard to look bored.
"Have you ever noticed that the timetable includes Room 212?" Lena asked.
Wiktor gave a short laugh. "Maybe because no one is supposed to look for it."
Karolina was already studying the map pinned beside the secretary's office. The room number was there, clear as day. Room 212 appeared on the schedule, but only during hours when the school was officially empty. No class listed beneath it. No teacher name. No explanation.
"That is not normal," Karolina said.
"At this school?" Lena muttered.
They waited until the corridor thinned out and the final bell faded into the building's heavy silence. Then they climbed the stairs to the next floor, where the paint had peeled from the walls and the air smelled of dust, old varnish, and something faintly metallic. The further they went from the main hallway, the quieter the school became, until even their footsteps sounded too loud.
At the end of a narrow passage, Karolina stopped.
There was a door.
No label. No sign. No classroom number on the frame. Just a faded mark beneath the ceiling light, nearly lost in the paint, but still readable if you knew what to look for.
212.
A thin blue glow leaked from the gap under the door, pale and cold against the dark floor.
Lena swallowed. "Tell me you see that too."
Wiktor reached for the handle before either of them could stop him. It gave with almost no resistance, and the door swung inward on a slow, dry creak.
Inside was not the classroom they expected.
The desks had been moved into a rough circle, as if someone had arranged them for a meeting no timetable had ever approved. The blackboard was clean, yet the room felt occupied, crowded with a presence they could not see. Blue light shimmered along the walls, catching on the edges of the desks and stretching the shadows into strange, wavering shapes.
Karolina stepped over the threshold first.
The air inside was colder than the corridor. Lena froze beside the door, and Wiktor shut it behind them more quietly than he had opened it.
Then something struck the back wall with a sharp, hollow crash.
All three of them turned.
From somewhere deeper in the room came a movement, slow and deliberate, as if someone had shifted their weight behind the desks.
The blue light dimmed.
Karolina's pulse hammered in her throat as letters began to appear across the blackboard, one by one, in pale white strokes. No chalk. No hand. Just words forming in silence.
Lena grabbed Karolina's sleeve. Wiktor took one step back.
And then, from the shadow behind the nearest desk, a voice rose in a whisper so close it seemed to brush their faces.
"I knew you'd come eventually..."