Very loosely based on Robert Louis Stevenson's Treasure Island, Castle in the Sky follows a pair of kids whose blue-collar habits make them perfect sky pirates. Sheeta, the heiress to a long-forgotten floating civilization, falls out of the sky into the arms of Tazu, a teenage miner. Tazu and Sheeta's playfulness and quick willingness to get their hands dirty puts them at odds with the military, whose lack of vision and maliciously furtive motives are embodied by their cryptic sunglass-wearing leader. The kids join forces with a group of sky-pirates to stop the military from gaining control of the Levistone, Sheeta's birthright and a potentially dangerous weapon. Here, Sheeta comically teaches the pirates to respect her work ethic, showing that, in Miyazaki's animes as in Stevenson's adventure tales, everybody, even the royalty, have to earn their place at the top.