Goku ends his training on Kaio's World, and tries out the force of an ultimate technique taught to him by Kaio, the Genki Dama. However, the Saiyans were approaching Earth sooner than expected. Even worse, Kaio discovers he made another miscalculation, and upon being brought back to life with the Dragon Balls, Goku has to return to the lower realm at breakneck speed. He dashes down the Serpentine Road at full power. And then, the ultimate nightmare descends from the heavens!