A police brigade working in the dangerous northern neighborhoods of Marseille, where the level of crime is higher than anywhere else in France.

A father travels from Oklahoma to France to help his estranged daughter, who is in prison for a murder she claims she didn't commit.

Zachary, 17 years old, gets out of jail. Rejected by his mother, he hangs out in the mean streets of Marseille. This is where he meets Shéhérazade.

A group of police officers with particular methods who track down a dangerous criminal in order to prevent Marseille from plunging into a bloodbath.