May 1940. Sergeant Jack Tanner has been posted to a training company on the south-east coast of England where the mysterious deaths of two Polish refugees lead him to believe there has been foul play. As the Germans launch their Blitzkrieg in Europe, the entire company are sent to join the battle to stop Hitler's drive across the Low Countries. Pitted against the die-hard Nazis of the SS 'Death's Head' Division and the great panzer commander, General Rommel himself, it is left to Tanner to get his men back to Allied lines. But if they are to have any hope of surviving the mayhem of Dunkirk, Tanner must first deal with an enemy far more deadly than the Germans...