Set after the events of the final battle with Kid Buu, the film focuses on the efforts of an evil magician, Hoi, to release the deadly monster Hirudegarn onto the Earth, forcing Goku and his friends to enlist the aid of a warrior named Tapion, who may be the only one capable of defeating the monster. Series creator Akira Toriyama designed the Tapion and Minotia characters.[2]