Jacques de Nisson, a rich man, has a new mistress, Lucie Cavelier. Which does not prevent him from courting Florence, the wife of his lawyer friend Forestier. One day, Jacques is found murdered and chief-inspector Candély is sent on the spot to investigate. Jean, the victim's butler, Lucie as well as Florence are suspected in turns but the real murderer is finally identified thanks to his fingerprints.
as Florence Forestier
as Lucie Cavelier
as Maître Forestier
as Richard, pastry chef
as Jean Barnet, valet
as Inspector Robert
as Suzanne
as Florist
as Pastry boy
as Mechanic
as Madame Clapet, concierge
as Jacques de Nissones
as Tessy
as Maurice Le Fèvre, garage owner
as Police Inspector Candély
as Professor Anthony
