Juve languishes in prison after being arrested as Fantômas, but when the Minster of Justice is kidnapped, the public is thrown back into fear and confusion, doubting whether it is really Fantômas who has been thrown in jail. Following this renewed wave of crime, the American detective Tom Bob sends word to the press that he will travel to Paris to investigate these mysteries, but will the famous detective be able to catch Fantômas and free Inspector Juve?