The spirit of a former agent turned anarchist, Lazarus, takes possession of Passepartout at a seance for Passepartout's recently-deceased Aunt Louisa. Lazarus, who died at the hands of Phileas, is intent on returning the favor. When Passepartout is thought mad and committed to an asylum, the spirit of Lazarus passes to Rebecca. Can Lazarus be stopped before his evil plan is accomplished? Help from an unsuspected quarter in the form of Aunt Louise's spirit makes an appearance.