"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!...

Son Goku has made it to the Tenka'ichi Budokai, the world's number-one martial arts tournament, where the competitors vie for the title of 'Strongest under the heavens.' Goku may have strength on his side, but even the training of a martial arts master Kame Sen'nin hasn't prepared him for what he's about to face. Only seven finalists remain, each with their own special moves. Will the champion be Goku? His fellow student Kuririn? Yamcha, the master...