Marilyne, a young French girl, is studying in Paris, where she lives a quiet and peaceful life in the company of Herve, a young faculty member. Her life is altered by the behavior of her mother Paula, a woman immersed in vice and corruption, dominated by an easy disposition to love the young people who come to her. Arrangement that leads her to feel a deep passion for her daughter's boyfriend, thus breaking the tranquility of the two young people. Marilyne flees and seeks refuge in Veronica, her young friend, singer by profession, who has always felt a deep love for the young woman. Veronica, delighted at the arrival of Marilyne, invites her to spend a few days in Rome, the city where she must record a program for television. The two young women live there an affair with two young Italian friends of Veronica.