Yuri, 16, has lived all his life in Gagarin Towers, a vast red-brick housing project on the outskirts of Paris. He dreams of becoming an astronaut. When plans to demolish Gagarin Towers leak out, Yuri joins the resistance. With his friends Diana and Houssam, he embarks on a mission to save their home, which has become his “starship.”

In Paris, a motley group of young people engineer a deadly plan to spread shock and awe in the city. Each plays their own role. Then they all hide in a department store, a symbol of the consumerist society they are attacking.