The main character is a teenager Thomas, who wakes up in the elevator, but does not remember anything except his own name. He is among the other teenagers who have learned to survive in an enclosed space. Once every 30 days a new boy arrives. A group of children has been living in the Shelter for three years. They feed on what they manage to grow on the ground, and try to find a way out of the labyrinth surrounding their place. But one day a girl appears in a state of coma ...Как-то так)