Girls in Chains is a 1943 American women in prison film directed by Edgar G. Ulmer and starring Arline Judge.

[1] Johnny Moon is a mob boss who controls everything from politicians to a profitable women's reformatory he secretly runs.

He has ruined many lives, including that of Helen Martin, a teacher, and her sister Jean.

A political reformer, Frank Donovan, is able to persuade Helen to go undercover behind bars, posing as a teacher of the inmates, to unearth evidence that will prove Moon's abuse of the incarcerated women.

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