At the time of the "big pirate era", in order to find the big secret treasure "ONE PIECE" left by the legendary one piece king Roger, countless pirates raised flags and fought each other. One young man who dreamed of becoming One Piece was called Lufei. He became a rubber man by eating the "Demon Fruit" by mistake. He gained the superhuman ability and paid the price of being unable to swim for a lifetime. Ten years later, Luffy went to sea in order to fulfill his agreement with Shanks, who had broken his arm because of his rescue. During the journey, he continued to find like-minded partners and began his adventure to become One Piece.