As the Pirate King Gold Roger was executed he revealed that his treasure, known as "One Piece", was hidden somewhere on the Grand Line. Monkey D.Luffy dreams of finding the legendary treasure and becoming the Pirate King, and after eating the devil's fruit gains the power to do so. But first he must find a crew ... Before he was exacuted, the legendary Pirate King Gold Roger revealed that he had hidden the treasure One Piece somewhere in the Grand Line. Now, many pirates are off looking for this legendary treasure to claim the title Pirate King. One pirate, Monkey D.Luffy, is a boy who had eaten the Devil's Fruit and gained rubber powers.