Start of the "Saiya-jin Saga". It has been five years since the defeat of Piccolo Daimao, and Goku and Chichi have settled down at Goku's old home in Mt. Paozu. They now have a son named Gohan, named after Goku's grandfather. One day Goku is supposed to meet his old friends for a reunion at Kame House house, but before he leaves he must find Gohan, who is lost in the forest. Meanwhile, a mysterious Saiya-jin warrior lands on Earth and searches for someone named Kakarotto. Instead, he finds Piccolo, who is still training to defeat Goku.