Fantomas, a master criminal, commits murders and heists, seducing a widow and infiltrating high society, ultimately evading execution by switching places with an actor.

Master criminal Fantomas kills an ambassador, is having an affair with the dead man's wife, sneaks into a rich woman's house handing out vanishing-ink business cards, is caught and sentenced to death but switches with an actor, who goes to the guillotine.—Ulf Kjell Gür