Psychiatrist EDWARD DERBY becomes obsessed with the beautiful, terrified ASENATH WAITE, who claims her father EPHRAIM is trying to take over her body with his mind. Despite causing considerable heartache to his devoted wife KATIE, Edward winds up having a sexual liaison with Asenath, which triggers the transfer of Ephriam's soul from Asenath's body to his own. Aware that he's descending into madness but powerless to stop it, Edward consults his best friend, fellow shrink DANIEL MEYER, who fails to believe Edward's story until it's too late...
