Three British paratroopers are cut off from their unit and are lost behind enemy lines. Sheltering in a deserted farmhouse, they are awaiting the return of their Sergeant who has ventured out in an attempt to locate their unit. The three soldiers are Tom, a world-weary cynical veteran, John, a middle-class educated thinker who despises war and Cliff, an eager soldier who loves his work. All three are highly trained professional killers who, regardless of their own personal thoughts, do not hesitate to perform their duties.