"Losyonok" is a children's ecological and local history camp located near the shore of Lake Ezhevichnoye. Children studying at the young tourists station happily spend every summer there. But this time the long-awaited trip turns into a real nightmare when a thunderstorm begins. Forty children are locked in a residential building. They are deprived of communication with the outside world. Time stood still. And everyone who goes outside will die. Fear reigns within the walls of this building. Creepy ghosts lurk in the shadows. But are they real? Who should you be afraid of more: mystical entities or real people? After all, food is running out...