Alan (
Anthony Steffen) is a wealthy aristocrat who has just been released from a mental institution following the death of his wife, the red-haired Evelyn. Having caught Evelyn making love with an unknown man prior to his institutionalization, the psychotic Alan begins luring red-haired strippers and prostitutes to his home to torture and kill them, as a way to deal with his grief and inability to get revenge on his deceased wife. Alan attends a séance in which the medium contacts Evelyn, causing Alan to faint. George Harriman (Enzo Tarascio) – Alan's cousin and his only living heir – offers to move into the mansion to take care of him. George takes him to a strip club and Alan takes home Susan (
Erika Blanc), one of the strippers at the club who disappears after barely escaping with her life. Afterward, George suggests that Alan would be cured of his instability if he replaces Evelyn with a new bride that resembles her. On his advice, Alan moves to London to get away from his home and marries Gladys (
Marina Malfatti), a blonde. Gladys finds herself being haunted by the strange goings-on at her new home and being shunned by Evelyn's brother and Alan's invalid aunt, whom Alan has taken in as staff at his mansion. Gladys tells Alan her suspicions that Evelyn faked her death to escape Alan and run away with her lover. Alan's mental state continues to unravel as Evelyn's brother and Alan's aunt are each killed by a mysterious killer. When he sees a zombified Evelyn beckoning to him from her tomb, he breaks down completely. When Alan is taken away for permanent institutionalization, Gladys and George celebrate, as they had been trying to push Alan back into insanity, with George supposedly impersonating Evelyn, so that he would gain control of Alan's fortune and estate. After they toast their success, Susan appears. George reveals that Susan was the one impersonating Evelyn and that the champagne Gladys is drinking has been poisoned. He stands by as Gladys attacks and kills Susan before succumbing to the poison. However, Alan appears along with Richard Timberlane (
Giacomo Rossi Stuart), the doctor who treated him for his first mental breakdown. Alan had suspected he was being manipulated all along and had faked his most recent breakdown to lure out the members of the conspiracy against him. George tries to escape and in the ensuing fight, a bag of sulfur-based fertilizer falls into the nearby pool. The water in the pool becomes acidic and George falls in, getting burned horribly. Getting out of the pool, George is arrested and Alan manages to get away with his crimes. ==Cast==