Werewolf in a Womens Prison (2006)

Ignoring the warnings of local residents, Sarah and her boyfriend, Jack, camp out in the mountains of Campuna. Jack gets ripped apart by a werewolf, and Sarah is badly mauled. Blamed for her boyfriend's gruesome death, Sarah is thrust into a Third World women's prison for the criminally insane. Here she and other helpless females get abused and sold for sex by the evil warden and his whip-wielding lesbian cohort. But Sarah discovers she has super-animal strength. As the full moon emerges, she turns into a huge, ferocious monster, and rips many of her abusers to bloody shreds.