A richly romantic action-adventure fantasy, set in a world where retro-futuristic vehicles permeate the skies. Against this lavish background are the lives of young and heroic van ship sky porters – Claus and Lavie – who are forced to take on the mission to deliver a mysterious girl, Alvis, to the battle ship Silvana. Before they know it, they become entangled in an aerial adventure between two countries gripped in an eternal war of magnificent air battleships.In a world that looks like the 19th century with anti-gravity devices, Claus and Lavie are pilot and co-pilot of a Vanship and act as couriers. They become involved with a mysterious mission after rescuing a little girl from a strange star-shaped killing machine. Not willing to let the girl die, they complete the mission by delivering her to the legendary mercenary ship Sylvana, only to become part of the crew as fighter pilots.