For over 400 years, the world has been a barren wasteland. The few humans that survive scrape together an existence in the cruel city of Pocatel--or go it alone in the wilderness beyond, filled with wandering spirits and wyrms. They don't last long. 13 year-old pickpocket Leandro and his sister Gabi do what they can to forge a life in Pocatel. The city does not take kindly to Cascabeles like them--the descendants of those who worked the San Joaquin...