Sylvia is a young street prostitute. She gets abducted by Monsieur Serge and his gang. Serge tries to terrorize her, hoping to make her work for him. But she reveals to be his daughter, abandoned with a sick mother long time ago. Worse, the abduction was her plan, with the help of the gang members, and she came to re-unite her parents. Which is bad news for Serge, as her mother is actually deceased.