When Thomas wakes up in the lift, the only thing he can remember is his first name. His memory is blank. He finds himself among 60 teen boys who have learned to survive in a completely enclosed environment. A new boy arrives every 30 days. The original group has been in "The Glade" for two years. They eat what grows in soil, trying to find a way to escape through the Maze that surrounds their living space. But one day a comatose girl arrives.