A giant castle in a mysterious world. Two shady Majin, Gomah and Degesu, watch a monitor. The monitor shows Goku and the others having a fierce battle against Majin Buu. Gomah and Degesu head to Earth to execute a certain conspiracy.

The battle continues to go poorly for Goku and his companions. After much hesitation, Glorio puts Arinsu's secret plan into action! As his friends watch in awe, what will Glorio's betrayal set in motion?!

Having been restored, Goku finally surpasses his limits! To defeat the mighty Giant Gomah, who keeps regenerating through the power of the Third Eye, everyone puts in their maximum effort in an all-out battle!