Thanks to Mitri's expertise, they land safely in England. Sebastian asks the Cyon chauffeur to stop off at the home of Dr. Qualus, a long-time associate who has been researching the Cyon family. Qualus' house is on fire. Ham and Sebastian find Qualus' body lying partially inside a pentagram, the body fatally mauled. The police arrive, and Inspector Cabell (an old acquaintance from their criminology days) escorts them to Cyon Manor. When they reach the Manor, they are greeted first by Sir Geoffrey Cyon (James Villiers), Anitra and Mitri's older brother and head of the family. He is aware that Sebastian and Ham are there to investigate him and wants his sister convinced that nothing is wrong. The real Anitra (also played by Ann Bell) reiterates her reason for consulting Sebastian: due to an unknown influence, Geoffrey's behaviour has changed dramatically and he has turned Cyon Manor into a den of . Geoffrey dismisses her concerns. The following day Mitri is attacked by dogs, badly injuring him. Sebastian and Ham suspect Geoffrey is behind the attack. That night, the duo investigate the grounds of the Manor and discover ruins which lead to a hidden underground temple devoted to Asmodeus. They suspect that the real Geoffrey is dead and that Asmodeus has assumed his form.