The cruel and abusive headmaster of a boarding school, Michel Delassalle, is murdered by an unlikely duo -- his meek wife and the mistress he brazenly flaunts. The women become increasingly unhinged by a series of odd occurrences after Delassalle's corpse mysteriously disappears.

In the South American jungle, supplies of nitroglycerine are needed at a remote oil field. The oil company pays four men to deliver the supplies in two trucks. A tense rivalry develops between the two sets of drivers on the rough remote roads where the slightest jolt can result in death.

Remy Germain is a doctor in a French town who becomes the focus of a vicious smear campaign, as letters accusing him of having an affair and performing unlawful abortions are mailed to village leaders. The mysterious writer, who signs each letter as "Le Corbeau" (The Raven) soon targets the whole town, exposing everyone's dark secrets....

Jenny Lamour sings in a music hall in postwar Paris, accompanied by her husband, Maurice Martineau, on piano. When Martineau notices his wife flirting with an older businessman named Georges Brignon, he follows her to Brignon's house with the intent to kill him. At the house, Brignon is found murdered -- but by someone else. Inspector ...

As Dominique Marceau is being tried for the murder of Gilbert Tellier, accounts by different witnesses paint a picture of the kind of relationship the two used to share.