Pierre Rossi and Béatrice live in the same block of flats in Marseille and love each other. One night Béatrice leaves her apartment. Pierre knows that his fiancée goes to a rendezvous but she would not tell him more than just that. Worried Pierre follows her but he is attacked and stolen his identity papers by two men Tom and Nasol on the payroll of Quaglio one of the city's bosses. Later on Quaglio kills Nasol and deposits the body in a garage leaving Pierre's papers nearby. As for Pierre he manages to follow Tom to a villa where several young women have been invited. Pierre horrified realizes that this place is the headquarters for the white slave trade. - Written by Guy Bellinger