Before the legendary pirate king, Gold.D.Roger was executed he 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, Mongkey,D.Luffy, is a boy who had eaten the Devil's Fruit and gained rubber powers.He dreams of finding the legendary treasure for never ending adventure and becoming the Pirate King. But before that he must find a crew ........ Greatness, Glory, and Gold. The Pirate King, Gold.D.Roger has conquered this all. He was executed with an unknown reason. 22 years after his death, a pirate named Luffy appeared and has only one gold , To Become the Next "Pirate King" and Find the Treasure "One Piece".
Luffy captain of the Straw Hat Pirates first through the sea of East Blue and then through the Grand Line. He follows the path of the deceased King of the Pirates, Gold D. Roger, from island to island on his way to the great riches One Piece. On his way his gathering grows and got a right hand man which is a swordsman - "Pirate Hunter" Zoro, a navigator - "Cat Thief" Nami, a sniper-"Sogeking" Usopp, a cook- "Black Leg" Sanji, a doctor- "Cotton Candy Lover" Tony Tony Chopper, an archaeologist- "Demon Child" Nico Robin, a shipwright- "Cyborg" Franky, and a musician- "Dead Bones" Brook.
During the course of the story, the gathering contends with other pillager crews, the royal Shibukai and the Navy . The latter are the subordinates of the corrupt World Government, who apparently seek justice by ending the Golden Age of Pirates. Many background news elements involve the delicate equilibrist of power between the World Government and the world's most powerful pillager crews, especially the Yonkou, the four most powerful pirates in the world.