Jeff, a notorious gangster, has just served 3 years in prison for pimping. He reunites with his accomplices and sets up a cigarette smuggling business, all the while maintaining a perfect alibi. We're in Dieppe, and the bustling harbor life allows a wide variety of people to indulge in a variety of trafficking activities.

Lydia, a model, and Helga, a flight attendant, live together and share the rent. Lydia gets a job in a cabaret, but the owner soon asks her to become a trainer, which she refuses. To punish her, he locks her up in his house. Thanks to her friend Helga, the police take a closer look at the manager's reprehensible actions.