Wealth, power, Gol D Roger, the Pirate King who once had it all, left a parting message before his execution: "Want my wealth? Then come and find it! Everything I have is there, on the Grand Line!" Thus, more and more people rushed to the sea, sailed into the Grand Line, and the world entered the Great Pirate Era! Many years later, a child swore to a one-armed pirate: "I will definitely become the Pirate King!" And so, 10 years later, a great legend began. This is a story about a group of dreamy kids, they have passion, they have perseverance, they have companions...