A mysterious figure signing himself "The Ferret" keeps sending letters to the police, tipping them off about murders that are to be committed around Paris. Among those caught up in the police manhunt is a fraudulent clairvoyant.

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Main Cast: Jany Holt, Colette Darfeuil, Pierre Renoir, Jacques Baumer, Jean-Jacques Delbo, Pierre Larquey, Jean Tissier, Jacqueline Delubac, Charles Dechamps, Marguerite Deval

Director: Raymond Leboursier

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