Bonnie Collins is sent to prison for murdering a man in self-defense who tried to rape her. She is in turn herself drugged and murdered by a vicious gang of women lead by a brutish inmate named Kay, causing her death to be ruled an accident. Her sister beautiful stuntwoman Laurie Collins does not believe it, and gets herself intentionally thrown in prison to seek bloody revenge against the ones responsible for Bonnie's death.
—charmardee-smith