A young couple retreat to a glass house for two weeks of celibate self-improvement but are disturbed by a lost hiker. As the stranger reveals more of himself, their feelings move from pity to revulsion and they must make a decision about what to do with him. But when the crisis is seemingly settled, strange forces compel all three to replay this scenario again.。一名警探发现有人与主要嫌疑人长得极其相似,这一诡异情况让这起谋杀案的调查变得更加错综复杂。。