A serial killer whose mother was a prostitute starts killing streetwalkers as a way of paying back his mother for her abuse.

In Genève, bookseller and publisher Axel Thorpe catches willful, rich 16-year-old Sibylle Ashby shoplifting. She brags about her writing, so he challenges her to produce a book. She writes an erotic novel that Thorpe publishes anonymously, and it becomes a best seller. She also tries to capture the love of this 40-year-old publisher but he drops her for her older sister.

Antoine has raised Sébastien, the son of a friend who was killed in a plane crash. Sébastien is doing his military service and Antoine would like him to marry Nathalie, the girl he grew up with. But Nathalie is in love with an American, and the day Sébastien has a leave, she leaves with her lover.

The story of Christophe, a young student, and his daily need for sex. Celia is his regular lay, but he still manages to find time for quite a few other women. Then Heidi, the daughter of one of his mother's friends stays with them for a few weeks, and he attempts to add her to his list of conquests.