Stanislas Oscar Seminario, aka SOS, is a young explorer, just back from Africa, visiting old friends: the Pescara’s. But the father keeps receiving anonymous letters. And soon a mysterious murder…

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…

On a rainy night, eccentric tramp Mr. La Souris finds a corpse. But the body soon vanishes in his car leaving only his wallet. While the police start investigating a…