A woman searching for her missing sister arrives at a small coastal village, where her sister was last seen. Unknown to her, her arrival has been noted by a crazed scientist, who has designs on her.

A total re-edit of Mario Bava's gothic classic Lisa and the Devil (1973) for US release in 1975. Cheesy exorcism scenes were shot to try to capitalize on the success of The Exorcist (1973).