The monstrous power of his Saiyan heritage first manifested when the kid Goku gazed upon ... moment with his granddaughter, Pan. As a tear fell from her cheek, Goku snapped back to reality.

For its first third, it follows Goku, Pan, Trunks, and Giru ... After Goku is made a kid again by the Black Star Dragon Balls, he goes on a journey to get back to his old self.