The bodies of Goku and Vegeta join to form a new Saiyan warrior. The monster Majin Buu is impressed by the strength of his new opponent, but refuses to take him seriously. Will Majin Buu's arrogance be his undoing?

Hearing that the hero Tapion is sealed away inside a music box, Goku and his friends summon Shenron to revive him. Trunks and Goten are overjoyed to meet the hero. However, Tapion is furious. This is because the upper half of the phantom demon Hirudgarn is sealed inside Tapion's body. At the same time, a strange monster appears, the lower half of which is real and the upper half is a ghost. The upper and lower bodies then combine and Hirudgarn is revived! Goku and his friends try to fight back, but he becomes a ghost when defending, so their attacks are unsuccessful. So what action does Tapion take?!