Enter King Piccolo

Goku and his friends find Krillin murdered. The referee says it was a monster that in addition took Goku's Dragon Ball and a list of tournament participants. A vengeful 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 retells how the world suffered his carnage long ago and how he and his master Mutaito had to trap him in a jar at the cost of Mutaito's life. It turns out Pilaf released King Piccolo and is assisting him. Goku catches up with King Piccolo's minion Tambourine.