Born long ago of a primeval force on a faraway planet, the Saiyans developed into a warrior race so devastating and relentless that their own planet did not survive their centuries of destruction. Now, one of them is coming to earth to find his younger brother Goku! The mighty Saiyan warrior Raditz arrives on Earth searching for his brother Goku, who was sent to Earth as a baby with a mission to destroy all traces of human life on Earth. However, Goku received a blow to his head upon his earthly arrival, causing him to forget his mission of destruction. Goku has instead become earth's most powerful defender. When Raditz arrives, he tells Goku to destroy 100 earthlings by the next morning or Goku's son Gohan will be killed. After Goku refuses his request, Raditz kidnaps Gohan.