Petrified begins when a black market antique deal is botched by a goon and his girlfriend, and the alien mummy they were selling is revived by the blood of the now dead dealer, Eldridge. His hormones raging, the mummy stumbles upon an in-patient psychiatric facility that is home to dozens of beautiful, voluptuous nymphomaniacs. But, the mummy doesn't know he's being tracked by one of the FBI's most famous agents, Buzz York. While the mummy wreaks havoc at the facility, the resident Dr. Von Gelder does everything in his power to protect his greatest experiment - eternal youth, in the form of the beautiful Cory.