After his last experience, Inspector Juve winces under such rebuff as the substitution of Valgrand and the escape of Fantômas. Eventually a mysterious crime puzzles him and his assistant, Fandor. To the chief of the Criminal Investigation Department, he reports that the body of a woman, found in the house of Dr. Charles, cannot be identified. Papers bearing the name of Lady Beltham had been discovered in her clothing. Was the body that of Lady Beltham, the accomplice of Gurn, or was it the intention that people should believe that she was dead?