The protagonist Lin Zhan, a modern fighting champion, died unexpectedly and became an orphan in the Dragon Ball world. What's even more bizarre is that his soul merged with the remnant soul of Wu Taidou (Kame Sennin's master and the legendary martial artist who sealed the Demon King Piccolo). He possesses all the memories, martial arts wisdom and some remaining skills of Wu Taidou, but the body is that of a five-year-old child.