Goku, who married to Chi-Chi with son Gohan, is living an idyllic life in the countryside when an alien ship lands on Earth. Inside is Goku’s brother Raditz who tells Goku that he is a sayian, a powerful destructive race. And that he was sent to Earth as a baby to conquer it. However after receiving a bump on his head, Goku forgot his mission and has lived instead to protect the planet. How Goku and his friends yet again find themselves searching for the seven Dragon Balls, as well as defending Earth and the universe from evil forces.