Two aging crooks are given two weeks to repay a debt to a woman named The American. They recruit their recently deceased partner's son to help them break into a laboratory and steal the vaccine against STBO, a sexually transmitted disease that is sweeping the country. It's spread by having sex without emotional involvement, and most of its victims are teenagers who make love out of curiosity rather than commitment.
Adèle Hugo, daughter of renowned French writer Victor Hugo, falls in love with British soldier Albert Pinson while living in exile off the coast of England. Though he spurns her affections, she follows him to Nova Scotia and takes on the alias of Adèle Lewly. Albert continues to reject her, but she remains obsessive in her quest to win him over.
Claude Massoulier is murdered while hunting at the same place as Julien Vercel, an estate agent who knew him and whose fingerprints are found on Massoulier's car. As the police discover that Marie-Christine Vercel, Julien's wife, was Massoulier's mistress, Julien is the prime suspect. But his secretary, Barbara Becker, while not quite convinced he is innocent, defends him and leads her private investigations.
