The film is a road movie that follows a middle aged man who gives a young woman a lift. On the car radio, news bulletins warn the population against a recently escaped sadist who is known to prey on young women and children. Lelouch often cuts away from the main story, if only briefly, to parallel events that are not necessarily crucial to the story but illustrate what is suggested by the radio.
A young woman falls down a staircase, and suddenly becomes... a nymphomaniac.
Preparing her gynecology thesis, Claude Sauvage, at the urging of a village doctor, Vincent Ferrière, agrees to replace him for a few days. During this time, she took it upon herself to abort the schoolteacher, who was afraid of giving birth to a handicapped child. But an anonymous letter denounces her, and she goes on trial.
