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...
Sarah Biasini
Marie-ChristineLinh-Dan Pham
Marie Van DinhCatherine Frot
Prudence BeresfordOphélia Kolb
GisèleHervé Pierre
The family doctorAgathe de La Boulaye
Doctor MatarazziKatia Tchenko
Miss SakhalineAndré Dussollier
Bélisaire Beresford