Ohyaku: The Female Demon

"The Legend of the Poisonous Seductress" saga begins with this bloody tale of an actress who seeks vengeance against her tormentors after being wrongly imprisoned. Ohyaku (Junko Miyazono) was just an innocent actress when she was accused of a crime that she didn't commit. Subsequently thrown into prison and brutalized by her fellow inmates at every turn, the once fragile girl is gradually transformed into a sword-wielding warrior whose back is adorned with a maniacal demon... (Allmovie.com)