In a Paris suburb condominium, after the death of a young woman's boyfriend, a strange and deadly game of death begins between three women living there.

The old Mr. Esbirol, a passionate bookseller of crime fiction, had waited for a long time that the three conditions necessary for committing a perfect crime materialize : murder, preferably by strangulation of an anonymous bystander walking in a deserted street.

The town of Carzac Shakespeare suffered a violent attack that caused a fire in the local factory. Many dead and wounded. Two citizens investigate the drama and discover that its origin could be criminal.

Maurice works at the police service for foreigners. He is single, loves Spanish music and spends all his free time in a Hispanic cabaret.

Married to a younger woman, Jacob sinks into jealousy, alcohol and violence.

A secret society, somewhere in France, is responsible for the major unsolved murder mysteries throughout history (such as Henri IV, Lincoln, Kennedy, John-Paul I)...

Mireille Bertillet, a provincial judge, is transferred to Paris. She inherits a heavy file compromising high personalities.

In La Roche-sur-Mer, the factory where the father of Mathieu's boyfriend, a 12-year-old boy, works will close. Desperate, the man tries to commit suicide and is saved by his son.

Michel, a referee has to suffer the consequences of having whistled a penalty against a team which is supported by football hooligans.

The "black robe" in the title of this suspense film belongs to a female lawyer, Florence Nat who has just lost a case in which she defended Simon Risler, a man wrongly accused of murder. Risler escapes before he can be put in prison, and seeks help from attorney Nat in finding the real killer, partly by going after the police inspector who framed him in the first place. A retired surgeon, in the process of setting up a drug rehab clinic gets involved in solving Risler's case, and soon the solution seems to be pointing to high-ranking figures with every desire and ample means to keep the truth well-hidden.

Jean-Paul Belmondo plays Paul, a former womanizer who marries the head of the medical department's "unattractive" daughter Christine because he thinks attractive women can't be trusted and make poor wives. A car accident leaves him bedridden and he begins to miss his playboy days, when Christine's bombshell sister Martine arrives and Paul decides he must have her. He begins drugging Christine at night so he can sneak out to kill of Martine's many suitors one by one.