A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle. A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle. A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle. A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle.