Ran Ran is the betrothed of Chiaotzu, the Emperor of Mifan, and she has disappeared. Master Shen, Chiaotzu’s minister, proposes collecting the Dragon Balls in order to find Ran Ran, though in reality he seeks to use them to do away with Chiaotzu and take over the empire. He goes so far as to enslave people from numerous places in order to help with finding the magical spheres.
Meanwhile, Mifan is holding a World Martial Arts Tournament, in which Goku, Krillin, and others are set to participate. Since the winner will be able to request any boon of the Emperor, Bora, whose world is being attacked by Mifun, joins the competition in order to get the Emperor to stop the invasion.
Regardless, Master Shen’s powerful followers are also set to fight in the competition…