Five years after defeating Piccolo at the 23rd Tenka'ichi BudÅkai, Son Goku has married Chi-Chi and they have a son named Gohan. When Goku and Gohan visit his teacher Kame-Sen'nin, they are confronted by a man called Raditz. He tells Goku that he is his brother and that Goku is a member of the Saiyan race who was sent to Earth to destroy it. Raditz kidnaps Gohan and tells Goku to kill 100 people within the next 24 hours. Piccolo agrees to help Goku defeat Raditz, finding him to be a greater enemy than Goku. When the two are about to be defeated, Gohan furiously attacks Raditz, enabling Goku and Piccolo to fatally wound Raditz at the cost of Goku's own life. However, before he dies, Raditz reveals that two Saiyans stronger than him will come to Earth in one year's time.