After their presumed defeat, the evil alien forces launch a surprise attack against the Aero Fighters' base, effectively destroying their aircraft. Unable to counter the attack, they must use old WWII-era warplanes with strange modifications, in a desperate scramble for victory.

After their presumed defeat, the evil alien forces launch a surprise attack against the Aero Fighters' base, effectively destroying their aircraft. Unable to counter the attack, they must use old WWII-era warplanes with strange modifications, in a desperate scramble for victory.