Leila, 16, wakes up late as every morning. Except that today there is nobody to press her. Where are his parents? She takes her bike and crosses her neighborhood, empty. Everybody’s gone. Thinking she was the only survivor of an unexplained catastrophe, she finally met four other youngsters: Dodji, Yvan, Camille and Terry. Together, they will try to understand what happened, learn to survive in their hostile world … But are they really alone?