Demonic forces amass against Liz Graham to remove her as head of the psychic society, P.S.I. Her husband Alec's plot to destroy her predecessor, Jonathan Keast, leaves Liz defenceless against Keast's schemes to depose her. Can Liz destroy the evil powers at work before they destroy her?This story of vengeance and retribution explores prescience, faith, betrayal, forgiveness and redemption, and takes place against a backdrop of occultism and the paranormal in 1970s London.