Bobby earns his living in Montmartre by duping naïve provincials, along with his pal Julien, as well as crooks and drug dealers, replaced by bicarbonate. His friend Monique, who dances at Le Paradou, is frightened by such a life. A crime of which he is not guilty occurs while he is robbing drug dealer Mureau. Bobby flees, but prefers to let himself be imprisoned. A serious accident is avoided. The brave Inspector Doirel is determined to set the boy straight. Monique will do her bit too.
Jean-Marc Thibault
Louis Seigner
Geneviève Kervine
Jean Marchat
Albert Dinan
Daniel Cauchy
Alain Bouvette
Denise Carvenne
Jean Clarieux
Georges Demas
Michel Flamme
Émile Genevois
Georges Géret
Jean Morel
Olivier Darrieux
Mireille Ozy
Étienne de Swarte
Michel Woop
Max Elloy
Charles Lemontier
Robert Seller
Hélène Tossy
Georges Lannes
Jacqueline Porel
Bernard Lajarrige