Raditz arrives on Earth to pick up his brother Goku. He finds that Goku apparently has no recollection of his origins or his mission to conquer Earth. Raditz kidnaps Gohan and blasts off towards his escape pod. Piccolo arrives and tells Goku that he’ll need some help to beat Raditz. Tien, Krillin, and Yamcha come along to help out. Piccolo charges the Special Beam Cannon while Goku and Tien try to hold Raditz off. Raditz beats down most of the Z-Fighters, leaving only Goku, Tien, and Piccolo left. Piccolo fires the Special Beam Cannon at Raditz, but Raditz manages to evade the attack. The technique then strikes the exhausted Goku, killing him. Gohan becomes enraged, which increases his power level incredibly. Gohan then hits Raditz in the face, sending him flying backwards. Raditz manages to hold off Gohan, but he is very weakened and collapses.
The Z-Fighters hear through Raditz’s scouter that two more Saiyans are coming to Earth and decide to take Raditz with them to hopefully use as leverage with the other Saiyans. Piccolo grabs Gohan and flies off, determined to use that power for his own purposes. The Z-Fighters begin training with Mr. Popo and Kami to become stronger. Raditz realizes that Vegeta will most likely kill him once he arrives on Earth, and so trains with Piccolo and Gohan to hopefully help fight the Saiyans.
Meanwhile, in the Otherworld, Goku meets King Kai and starts training on his planet. He learns the Kaioken and the Spirit Bomb.