铁窗泪滴，一片愁肠锁心头。诗晴晴公交车

　　Frightened 19-year-old Marie Allen gets sent to an Illinois penitentiary for being an accomplice in an armed robbery. A sympathetic prison head tries to help, but her efforts are subverted by cruel matron Evelyn Harper. Marie's harsh experiences turn her from doe-eyed innocent to hard-nosed con.