The story takes place on the Riviera, where the title character may or may not be involved in various shades of skullduggery, including murder.
Roland Toutain
as Joseph Rouletabille
Huguette Duflos
as Mathilde
Marcel Vibert
as Le vieux Bob
Léon Belières
as Sainclair
Edmond van Daële
as Robert Darzac
Wera Engels
as Edith Rance
Kissa Kouprine
as Marie
Henri Kerny
as Le père Jacques
Michel Kovally
as Le prince Galitch
