Marie-Chantal travels by train to her cousin's place to spend a winter holiday, when a stranger entrusts her with false jewels that contain a virus powerful enough to destroy all humankind.

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Main Cast: Marie Laforêt, Francisco Rabal, Serge Reggiani, Charles Denner, Stéphane Audran, Akim Tamiroff, Roger Hanin, Antonio Passalia, Pierre-François Moro, Robert Burnier

Director: Claude Chabrol

Writer: Claude Chabrol

Editor: Jacques Gaillard

Cinematographer: Jean Rabier

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