Sneaking out of the palace into the outside world to find the legendary Peaches of Immortality to gift to his father, 12-year-old Shang-Chi refuses to fail in his quest until he hears things that make him wonder if his father deserves to be saved.

"Goodbye, Dragon World. The world's greatest heroes have fallen, absorbed by the ever more powerful Boo, who has slaughtered everyone on the planet. Only Goku remains alive to fight ... but even his strength will not be enough, unless he uses the Fusion Earrings to permently merge with another warrior! Who will he choose ... and when the dust has cleared, who or what will he become? On earth, among the stars, and in Boo's body, the last battle rages!...

The Lord of Lords, the mightiest of the dieties has come to Earth seeking Goku, Gohan, and Vegeta's help in preventing the evil wizard Bobbidi from resurrecting the imprisoned djinn Boo. If they lose, their power will be fed to the djinn to make him even more powerful.