一所英国寄宿学校附近的水力压裂地出现了一个神秘陷坑,被释放出的恐怖力量令整个学校变成了一个血腥的杀戮战场。。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.。精神医生Lilian Steiner就自己一个病人的死展开了调查,她相信这是一起谋杀。。