Cult horror directed by Jesús Franco in which Dr. Frankenstein (Dennis Price) is murdered before he can envisage his morbid creation coming to life. The evil immortal wizard Cagliostro (Howard Vernon) captures the monster and aims to use it to create an elite master race, but Frankenstein’s daughter Vera (Beatriz Savón) is hot on his heels and keen to avenge her father’s death. Vera falls into the perverse clutches of Cagliostro, who has wicked agendas in mind.