Trafic de filles (1969)

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.