Jean Leuvrais

Police Inspector Staniland is investigating the death of a pianist. While conducting his investigation and looking through the victim's apartment, he meets Barbara, the mistress of the murder victim. Barbara confesses to the crime, but Staniland, based on his observations and experience, does not believe her. He then sets out to find the truth.

A young French teenage girl after moving to a new city falls in love with a boy and is thinking of having sex with him because her girlfriends have already done it.

The film's plot is based on the Kennedy assassination and subsequent investigation. The film begins with the assassination of President Marc Jarry, who is about to be inaugurated for a second six-year term of office. Henri Volney, state attorney and member of the commission charged with investigating the assassination (based on the Warren Commission) refuses to agree to the commission's final findings. The film portrays the initial controversy about this, as well as Volney and his staff's reopening of the investigation.

An unemployed investor creates a fictious business partner to attempt to improve business. Eventually, his creation gets out of control as his business becomes successful and his wife announces that she is in love with the partner and his son wishes the partner was his father -- although no one has ever seen him. To regain control, the man decides to "kill" his imaginary partner and is arrested for the murder.

Henri Rainier has everything a man could want. A glamorous wife, two beautiful daughters and a well-paid job with a large bank. Then, one day, his entire world collapses. In the wake of a high-profile financial scandal, he is summoned into his director's office and accused of negligence. Rainier has no choice but to resign, but he soon realises that he has been made a scapegoat. He begins his own investigation in an attempt to clear his name and discover who is responsible for the enormous hole in the bank's finances. It soon becomes apparent that he is up against a very powerful and dangerous opponent.

Adapted from Les Diaboliques by Jules Barbey d'Aurevilly.