精神病学家卡拉(朱丽安·摩尔 Julianne Moore 饰)不相信存在多重人格症,她父亲(杰弗里·迪马恩 Jeffrey DeMunn 饰)却让她诊断一个多重人格的奇怪病例。病人大卫(乔纳森·莱斯·梅耶斯 Jonathan Rhys Meyers 饰)性格温和,但在接到电话后瞬间就变为个性彪悍的亚当。百思不得其解的卡拉驱车前往人格大卫的故居,得知真正的大卫多年前就已然…
A newly reunited young couples 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.