The eighth and final season of Ironside begins with the first episode of a two-part story. Believing herself possessed by the malevolent spirit of her dead brother, college coed Susan Todd (Sian Barbara Allen) confesses to the murder of her mother. Suspecting that Susan is not telling the truth, Ironside (Raymond Burr) consults a psychic to determine the murderer's actual identity. Meanwhile, Susan's somewhat sinister psychoanalyst Theodore Gallin Bill Bixby lurks ominously in the background.