The Big Doll House

The Big Doll House is a 1971 American women in prison film starring Pam Grier, Judy Brown, Roberta Collins, Brooke Mills, and Pat Woodell. The film follows six female inmates throughout daily life in a gritty, unidentified supratropical prison. Later the same year the film Women in Cages featured a similar story and setting, much the same cast, and was shot in the same abandoned prison buildings. A nonsequel followup, titled The Big Bird Cage, was released in 1972.

Colliers cellmates Alcott and Bodine Collins and Woodell plan to escape. Collier and another cellmate Ferina Gina Stuart agree to go along. Assisting is their other lesbian cellmate Grear Pam Grier, though there are doubts Grears heroin addict girlfriend Harrad Brooke Mills will be equipped to escape.Ferina, Alcott and Bodine break from the solitary confinement sauna and take their revenge on Lucian. The escapees wield guns, attitude, and sexuality to free themselves. ........

Source: Wikipedia