One Piece is a long series written and illustrated by Eiichiro Oda.

A boy named Monkey D. Luffy, inspired by his childhood hero "Red-Haired" Shanks, sets out on a journey to find One Piece, the legendary treasure of the King of the Pirates, Gol D Roger. To accomplish this, he must reach the end of the most deadly and dangerous ocean: The Grand Line.

Luffy captains 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, Gol D. Roger, from island to island on his way to the great treasure One Piece. On his way his crew grows to have a firstmate - swordsman "Pirate Hunter" Roronoa Zoro, a navigator - "Cat Thief" Nami, a sniper-"Sogeking" Usopp, a cook- "Black Leg" Sanji, a doctor- Tony Tony Chopper, an archaeologist- Nico Robin, a shipwright- "Cyborg" Franky, and a musician- "Dead Bones" Brook.

During the course of the story, the crew contends with both other less moral pirate crews and the Marines. The latter are the subordinates of the corrupt World Government, who apparently seek justice by ending the Golden Age of Pirates. Many background story elements involve the delicate balance of power between the World Government and the world's most powerful pirate crews, especially the Yonkou, the four most powerful pirates in the world.