Claude Valmont is married to a boring wife and has a boring job and a boring life. One day he encounters Cathy Stewart and has a romance with her. Then he meets a man in a bar who introduces him to a world of exciting sexual encounters with swinger Edwige Faillel - in a cinema, at the races where she is gangbanged by three jockeys, and in some sort of brothel with her and Diane Dubois.