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…

Cecile, a young girl who goes to the offices of the Judicial Police several times in a row to complain about nightly visits to the apartment she occupies with her…

A village in the French Alps is rocked by a series of crimes, including the theft of a sacred ring and the murder of a man dressed as Père Noël…