当她十几岁的女儿失踪时，一位母亲最可怕的噩梦成真了。

A newly reunited young couple's drive through the Pacific Northwest turns into a nightmare as they are forced to face nature, unsavory locals, and a monstrous creature, known to the Native Americans as Oh-Mah.

居住在意大利的卢西奥·弗尔兹（卢西奥·弗尔兹饰，也是本片导演兼编剧）脑子时常会有谋杀案的场景出现，于是他边去拜访了一位心理医生（大卫·L·汤普森饰），两人一起寻找答案，结果却发现事情远远不是如他们所想