Goku and his friends find Krillin murdered. The referee says it was a monster that also took Goku's Dragon Ball and a list of tournament participants. Goku takes the Dragon Radar and charges off in pursuit of the killer. Judging by a crest on a paper, Roshi knows this to be the work of King Piccolo. Roshi explains how the world suffered his carnage long ago and how he and his master Mutaito trapped him in a jar at the cost of his own life. It turns out Emperor Pilaf released King Piccolo and is assisting him. Having learned from Pilaf about the origin of the dragon balls, Piccolo insist on using them to restore his youth while continuing his plan of world conquest. Meanwhile, Goku catches up with King Piccolo's minion Tambourine.