This sexually explicit version of the Frankenstein story was based on erotic Italian comic strips. Dr. Frankenstein (Dennis Price) and his servant Morpho (Jesus Franco, who directed) are at work in the lab when a carriage pulls up carrying a bird-woman named Melissa (Anne Libert). Sneaking into the castle, Melissa and her driver Caronte (Luis Barboo) kill both the doctor and Morpho, then abduct the monster (Fernando Bilbao). They really serve an evil count, Cagliostro (Howard Vernon), who wants the monster for his own nefarious ends. Only the late doctor's daughter Vera (Beatrice Savon) can stop Cagliostro, but whether or not she does is unimportant. Several versions of the film exist, but all linger on the sexual possibilities of the story. Ranging between 80 and 90 minutes, each version differs only in the amount and frequency of graphic couplings. Britt Nichols and Alberto Dalbes co-star, and one edit contains the first screen appearance of cult icon Lina Romay.