The movie starts with an interview with director Claude Lelouch. He pleads viewers not to disclose the plot of the movie after leaving the projection room. Even the movie's trailer shows only a long sequence of faces gazing speechlessly in space. "Like all my movies, this one is about a man and a woman", says Lelouch in the interview.
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.
