Francis makes a living from his charms, satisfying a large and varied clientele. His gigolo activity is beginning to tire him. A couple of perverted customers, wanting to see him make love with their dog Rita, decide to give up for good. He joins Martine, a healthy, well-balanced young woman.

The murder of two workers and a high school student triggers a series of investigations, the conclusions of which are eagerly awaited. After several attempts, a sergeant manages to catch the killer.