Japan's top anime creators bring a richly romantic action/adventure fantasy in an imaginary planet where retro-futuristic sky vehicles permeate the skies. Against this lavish background are the lives of a young and heroic air pilot duo --- Claus and Lavie -- whose assignment to make a special human delivery fails. Before they know it, they become entangled in an aerial adventure between two countries gripped in an eternal war of magnificent air battleships, noble generals, and a mysterious war-mediating Guild.