It's 1917 - World War One. A secret German weapon - The Battleship of the Skies - threatens the allied forces of Americans, British and French with certain defeat. Imagine an airborne Titanic, bristling with state-of-the-art weaponry.
Barney and Luke, our boys in uniform, take it on.
"You can do it," their French girlfriends, Mitsou and Yvette, say.
Barney and Luke, just out of saddles and only briefly behind the wheel of an army truck, find themselves in the cockpit of a Gunbus - the world's 1st fighter plane.
Luckily, Captain Bannock's renegade British air squadron joins the battle.
It's a battle you'll have to see to believe.