Gokuu Son is a young boy living alone in the woods—until a girl named Bulma stumbles upon him while searching for a set of magical objects known as the "Dragon Balls." Since these artifacts are said to grant a single wish to anyone who collects all seven, Bulma hopes to gather them and wish for the perfect boyfriend. Gokuu happens to have a dragon ball, but he refuses to give it up, so Bulma strikes a deal: he can join her on her quest if he allows her to borrow the dragon ball's power. With that, the two embark on a journey of a lifetime.
They don't travel alone. Along the way, they meet the old Muten-Roshi and his aspiring disciple Kuririn, with whom Gokuu trains to become a stronger martial artist for the upcoming World Martial Arts Tournament. However, not everything is fun and games; the ability to make any wish come true is a powerful one, and there are others who would do far worse than just wishing for a boyfriend. To stop those who would misuse the legendary power, they train to become stronger fighters, using their newfound strength to help the people they encounter along the way.