In a seedy bar in a town ravaged by war, scientist and businessman Hunt hires mercenary and former Royal Marine D.C. to assemble a crack team of ex-soldiers to protect him on a dangerous journey into no-man's land. Their mission is to scope out an old military bunker in Eastern Europe. It should be easy – 48 hours at the most. Lots of cash for little risk. Or so he says...

故事发生在1944年的德国，一群德国士兵在盟军的乘胜追击之下被迫躲入了一座碉堡内。铂依曼（杰森·弗莱明 Jason Flemyng 饰）是连队里最不受待见的一个，即使到了这样的紧要关头，他依然是众人排挤和嘲讽的对象。 除了克虏伯（西蒙·坤茨 Simon Kunz 饰）和司申科（安德鲁·蒂曼 Andrew Tiernan 饰）外，克鲁茨曼（埃迪·马森 Eddie Marsan 饰）也被深深的愧疚所缠绕，他觉得他们现在尴尬的处境完全是因为自己一人所导致的。战争给每一个人的心灵都带来的深深的伤害，在幽暗的碉堡里，这种伤害似乎被无形的放大了。一连串莫名其妙的事件在碉堡里发生了，在黑暗之中，似乎还存在着别的什么东西。

In the brutal trench fighting of the First World War, a British Infantry Company is separated from their regiment after a fierce battle. Attempting to return to their lines, the British soldiers discover what appears to be a bombed out German trench, abandoned except for a few dazed German soldiers. After killing most of the Germans, and taking one prisoner, the British company fortifies to hold the trench until reinforcements can arrive. Soon, however, strange things being to happen as a sense of evil descends on the trench and the British begin turn on each other.