德国男星肯·杜肯自导自演的惊悚片处女作，精神创伤的精英战士在前往柏林探望女儿的途中搭载了一名面善的拦车者，却没料到后者正酝酿着一起柏林恐怖袭击。伴随多次视角转换和对善恶问题的拷问，在逐步揭开极端的意识形态深渊的同时，两名主角最终将故事引向意外结局。
The film opens in a bleak police station where celebrated war correspondent Kate Rafter (Seagrove) faces questions from a psychiatrist, Dr Shaw (Kurylenko), as they work through the painful events of Rafter’s life. A horrific incident in war-torn Iraq and the death of her mother (Steed) have brought a haunted Rafter home to Herne Bay, a place she believed she had escaped forever. Her resentful sister (Friel) has not made her sister welcome and her forbearing husband Paul (Miles) fails to broker peace. Whilst packing up her mother’s belongings from her childhood home, Rafter comes to believe there is something strange and terrifying happening in the house next door.
在明尼苏达州北部的“边界水域”中，六个老朋友之间的周末露营之旅在神秘的环境下死亡后变得悲惨起来，随着他们企图在本集团内揭露杀手，引发进一步的动荡。
