On an isolated island, a group of teenage delinquents living in a youth center wake up to find themselves alone with no one to watch over them. After much partying, their supervisor appears out of nowhere, feverish and shaking. He suddenly attacks the students. They fight back and kill him accidentally, leaving them no other choice than to flee the crime scene. As they run away, they realize the island has been deserted. Or practically. The few adults they encounter on their journey all seem to be infected by a mysterious epidemic, making them violent and dangerous. It gradually becomes clear to them that children and adolescents aren’t affected by this disease. In order to survive, they need to respect one golden rule : DON’T GROW UP. But one of them is turning 18 very soon...