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.
In France, in 1930, a supervisor of a boarding school for young offenders seeks to awaken the music by forming a choir, despite the skepticism of his boarding school director.
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 is committed. SOS begins to investigate...
