Prudence and Bélisaire Beresford have decided to take things easy. But when a rich Russian heiress disappears, Prudence can't resist and Bélisaire is forced onto the adventure. Their investigation will put them on the trail of a mysterious scientist who holds the secret to eternal youth...

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Main Cast: Catherine Frot, André Dussollier, Nicolas Marié, Agathe de La Boulaye, Linh-Dan Pham, Éric Naggar, Bernard Verley, Hervé Pierre, Sarah Biasini, François Bettens

Director: Pascal Thomas

Writer: Agatha Christie

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Cinematographer:

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