SkyGunner follows the story of 3 ace pilots, Ciel, Copain and Femme, who are hired to protect the “Eternal Engine” an engine capable of perpetual motion without the need for an outside power source. Little do they know, that the criminal genius, Ventre is planning to use the town’s celebration aboard the luxury airship Merveilleux, as an opportunity to steal the Eternal Engine for his own evil ends…