Scotland. In an isolated glen, where only the occasional camper ventures, an inhumanly savage killer is loose. A couple in their tent are worse than slaughtered; their remains look like puree.
Four weeks later, a British Army platoon choppers into the same glen on a training exercise. No one's thrilled to be there -- they're soldiers, but they're also just guys in camouflage uniforms, and they're going to miss a championship soccer match tonight, out in these godforsaken woods.