Dragon Ball Z
Five years have passed since the fight with Piccolo Jr. and Goku now has a son, Gohan. The peace is interrupted when an alien named Raditz arrives on Earth in a spacecraft and tracks down Goku, revealing to him that that they are members of a near-extinct warrior race called the Saiyans.
Long ago in the mountains, a fighting master known as Gohan discovered a strange boy whom he named Goku. Gohan raised him and trained Goku in martial arts until he died. The young and very strong boy was on his own, but easily managed. Then one day, Goku met a teenage girl named Bulma, whose search for the mystical Dragon ...