It was during one of his missions in Norway that Antoine learned of his wife's death. He leaves his experimental submarine and returns to Paris. Helene was found in the Seine and had taken barbiturates. Even though he had not been with Hélène for six years, he knew her well enough to believe that she was incapable of committing suicide. So who and why?

Robert Dumortier and his son "La Puce" live on a barge moored to an island of the Seine and Robert dreams of cruising remote and exotic seas.

Julienne Lebas is a financial assistant at a real estate developer but she has published a novel and hopes to become an actress someday.

Three men with a penchant for gambling on the horses soon find themselves in trouble because of their addiction. Pierre (Michel Piccoli) is the math whiz who uses his talent for picking the winners. Charles (Michel Galabru) is the wealthy scrap-iron magnate who has embarrassing evidence on many prominent political figures. Loic (Jacques Dutronc) is the aspiring politico who seeks to further his career by any means possible. Charles approaches Loic and asks his political party for a loan in hopes of fixing an upcoming race....

Rita is a girl that lives on taking gangsters as lovers. But when the money stops coming, she swears revenge.