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...
Stanilas Octave Seminario aka 'SOS', détective
Muriel Pescara, the daughter
Charles Pescara, the son
Doctor Gérard Pescara, the father
Guillaume
Paul Wantz
Hélène Tassin, nurse
Doctor Vermeulen
Investigating judge
Brigitte Tassin
Doorman
Lock keeper
Road mender
Gardener
Baptiste, clerk
Hotel boss
Illusionist Pablo
(uncredited)
(uncredited)
Man (uncredited)
(uncredited)
(uncredited)
(uncredited)
(uncredited)
(uncredited)
Concierge (uncredited)
Concierge (uncredited)
(uncredited)
(uncredited)
Pescara cook (uncredited)
(uncredited)
Gossip (uncredited)
Director (uncredited)
(uncredited)
Gossip (uncredited)
Agent on duty (uncredited)
Telephone operator (uncredited)
