In a postapocalyptic world of endless snow, eighteen-year-old Captain Romulus Buckle and the stalwart crew of the Pneumatic Zeppelin must embark on a perilous mission to rescue their kidnapped leader, Balthazar Crankshaft, from the impenetrable City of the Founders. Steaming over a territory once known as Southern California--before it was devastated in the alien war--Buckle navigates his massive airship through skies infested with enemy war zeppelins...