André Laroche, an industrialist, has just passed away. Face to his grave, as he is being buried, Anne de Vierne, the wife of a magistrate, confesses to her son François that Laroche was in fact Lupin and that he is his natural child. But he is not the gentleman thief's only offspring! Lupin had indeed another son by a housemaid, Gérard Dagmar, a dancer, magician and - occasionally - burglar. Which complicates the task of François who, to respect the last wishes of the testator, has gone in search of the treasure of Poldavia. For he keeps finding Gérard on his way and his efforts are constantly thwarted by his half-brother. Will Gérard prevent François from becoming the worthy successor to their father or will the two young men decide to join forces? That is the question.
Gérard Dagmar

François de Vierne

Nathalie

Catherine

Le préfet de police

Baron von Krantz

Madame Bellac

Charly

Hans

Madame de Vierne

M. de Vierne

Le chroniqueur mondain débutant

M. de Bellac

le croque-mort

Ganimard

Elizabeth de Poldavie

Charlie, le Barman

Un gangster à l'enterrement

Basile

Cecile Borel

Maitre Puisette

Le Ministre

Unknown Role

Le gouverneur

Le "docteur"

Le petit Michel
Le patron de la boite de nuit