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...
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Original literary source: "La Dame d'onze heures", novel by Pierre Apesteguy, Editions La Bruyère (collection La Cagoule N° 24), Paris, 1946, 154 pages. See more