The Battle of Passchendaele, 1917. For three years the great war has been waging, and the two armies find themselves entrenched along the four-hundred-mile Western Front. At the start of a pivotal allied offensive to break the stalemate, the nine-man crew of a British MKIV Tank set out to destroy a series of heavily defended German bunkers.

Douglas, a broken, solitary, Spitfire Ace, must overcome his past to lead a Lancaster bomber crew in the pivotal aerial war over Berlin, in 1943.