Criminal mastermind Fantômas a man of a thousand faces is unhappy with Fandor a journalist who's written a fictive interview of him. He kidnaps Fandor threatens to kill him but first goes about ruining the journalist's reputation by committing a sensational crime in Fandor's guise. Hot on the trail is police Commissaire Juve so Fantômas commits a crime looking like him. Soon our intrepid heroes Fandor and Juve with the help of Fandor's girlfriend Hélène are on the mastermind's trail but who's in control?