Bumi, a 14-year-old boy, is stranded on a foreign planet, when the shuttle that transports him has an accident. He loses contact with his father and all he has is a device that repeatedly transmits his father's last messages. It tells that his father left him a castle at the end of the planet named Utopian. With the help of a dragon, Bumi finds the Utopian castle. What he does not know is that a sword symbolising the power of four kingdoms that were at war, is being kept in the castle. Nino, one...