Outside at night. Tower of lodgings. A syncopated jazz accompanies the successive appearances of young people in front of the camera. Zim, delivered to the police by locals for stealing gasoline, ends up in jail. On the day of his release, he meets Jean-Pierre, who has just been released from the same Parisian jail. The two youngsters become friends. Back in the suburb, Zim decides to find a job and tries to convince Jean-Pierre to go with him - without success.