A young pilot, fresh out of training, is called to join a Flight while they wait for the call to scramble. Throughout a single day, he witnesses the skies of southern England filled with deadly dog fights, and after every exhausting battle the men return to their dispersal hut, only to find another of their number missing. Unwilling to surrender, the pilot and his comrades unite to take to the skies once more, determined to defend not only the airfield, but their entire country.

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.