Un plan diabolique

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. Goku catches up with King Piccolo's minion Tambourine.  (Source: Wikipedia)