Dragon Ball follows the adventures of the protagonist Son Goku, a super strong naive boy who, upon meeting Bulma, sets out to gather the seven wish-granting Dragon Balls. After becoming a student of martial arts master Kame-Sennin, he and his fellow pupil Kuririn enter a tournament that attracts the most powerful fighters in the world. He then sets out on his own and winds up facing and destroying the Red Ribbon Army single-handedly. When Kuririn is later murdered after another tournament, Goku exacts revenge on his killer Piccolo Daimao. Three years later, Goku, now a young adult, must fight Piccolo Daimao' s offspring Piccolo. The remaining 325 chapters of the manga were adapted into the Dragon Ball Z anime.