Ivan Wilmot

A government agent is returning from France with secret blueprints that were stolen from his government. On the train ride home, thieves break into his compartment and murder him.

Jean Boucheron the cat burglar is the darling of the Montmartre whores--and catches the eye of slumming socialite Zelia de Chaumont, who decides to "reform" him. A complication is his lovely young ward Odile... murder and a grand courtoom scene ensue.