A painter named Dollon gets arrested for a mysterious murder, but he is soon found dead in his cell. The corpse vanishes and his fingerprints turn up at a series of crime scenes. A young journalist and the sidekick of the famous detective Juve, Jérôme Fandor, gets involved into a spate of these terrible crimes and becomes increasingly convinced that they are linked by the agency of the terrible king of atrocity, Fantômas.