Thirteen-year-old Lena finds a map in the school library that points to a door no one else seems to know. When she follows it, the abandoned wing leads her somewhere impossible.
Lena knew the old school better than most people knew their own houses. She liked the forgotten corners, the narrow stairwells, the echoing corridors where the paint was peeling and the light always seemed a little too dim.
On a stormy afternoon, while rain hammered the windows and the library smelled of dust and wet wool, she stayed behind to help the teacher sort a stack of books from the lowest shelf. One of the books slipped, and something stiff and yellowed slid out with it. Lena picked it up and froze.
It was an old map of the school, drawn by hand, with names for rooms no one used anymore and hallways that had been sealed off years ago. At the far end of a corridor that should have ended in a wall, someone had marked a tiny door and written, in faded ink, Door of Mist.
Lena looked up. The teacher was at the other end of the room, occupied with a cart of books. Her pulse quickened. The map was too strange to ignore.
When the final bell rang and the building began to empty, Lena folded the map into her pocket and slipped away from the library. She followed the route it showed, past the busy classrooms, past the music room, then farther and farther from the noise until even the floorboards seemed to hold their breath under her shoes.
The corridor on the map was there, but wrong somehow. The windows were filmed with dust. Cobwebs trembled in the corners. The air was colder than it should have been, and the silence felt pressed tight, as if the school itself was listening.
At the very end stood a door Lena had never seen before.
It was narrow and carved with patterns worn smooth by time. A thin veil of mist curled around its edges, drifting across the handle as if it were seeping through from somewhere on the other side.
Lena hesitated only a second before reaching out.
The handle turned without a sound.
Inside was not another corridor, but a vast fog-bound space that swallowed the light behind her. Shapes moved in the mist. Children, maybe, though none of them looked familiar. Their faces flickered in and out of view, and pale butterflies glimmered around them like sparks caught in air.
One of the children stepped forward and smiled, as if Lena had been expected. “So you found it,” it whispered. “Then you’ve already crossed the first threshold.”
The butterflies lifted together, spiralling into the shape of an old key.
Then, somewhere deep in the mist, something answered with a slow, unmistakable click.