At the BRI Versailles, a unit specializing in organized crime, Saïd leads a team of young cops. He will lead Badri, Vanessa, Julien and Socrate and will have to take up the challenge of succeeding Patrick, a respected former chef. Éric Perez, an informant thug from Patrick, tries to warn Saïd that a gang war threatens to set the capital ablaze. A shooting breaks out, a man and a child are on the ground.