When Igor picked up the torch, he saw that the handle of the school door was covered by a thick layer of dust. They were standing in the empty, forgotten courtyard of an abandoned building that had once been bustling with life. Now, in the shade of the trees, it looked like a scene from a horror movie. "Are you sure this is a good idea?" - whispered Ola, clutching an old map in her hand. Igor shrugged his shoulders and looked meaningfully at Maja and Bartek. For several weeks, they had been haunted by the story of nightly whispers coming from the classrooms and the light in the windows of the old school, even though no one had lived there for years. No one had the courage to check what was really going on inside. "Maybe we'll find something interesting? Maybe some trace of former pupils?" - said Bartek to add to his animus. They walked through the corridor, which seemed to lengthen with every step. Maja shone her torch at the walls - old school papers and cracked photos of classrooms. They stopped at the door to the biology room, because that was where, according to an old notebook they had found in Ola's attic, the strangest things were supposed to happen. Suddenly they heard something. A quiet, dragging whisper, coming from behind the closed door of the room. Igor stopped first. "Anyone here?" - he asked in a trembling voice. He was answered by silence, and then that whisper again, as if someone was reading aloud a passage from an old book. The friends looked at each other in horror. Ola reached for the door handle and.... At the same moment, the light of their torches flickered and the door to the hall slowly began to swing open. Behind them they saw something that neither of them could have expected....