A rookie police officer willingly takes the last shift at a newly decommissioned police station in an attempt to uncover the mysterious connection between her father's death and a vicious cult.

这部心理惊悚题材的影片故事设置在1950年代加州沙漠里的一个与世隔绝的乌托邦式群体当中，讲述一位家庭主妇(Pugh饰)意外地发现了看似平静的生活中的恐怖秘密。