The quirky staff of an American magazine based in 1970s France puts out its last issue, with stories featuring an artist sentenced to life imprisonment, student riots, and a kidnapping resolved by a chef.

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.”