Goku watches helplessly from Other World as Majin Buu sets his sights on Gohan. Luckily the Old Kai reveals a secret source of power that could save the day. Is Goku ready to bond with his son and put an end to Majin Buu's reign of terror?

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?