Traveling to the world of One Piece for three years, Karen was just an ordinary ship repairman in Windmill Village who was worried about rent, until he was accidentally bound to the "Final Voyage System" and a talking spiral fruit became the anchor of his destiny.
Without extraordinary initial abilities or a prominent background, he started from the reef forest in the East China Sea, using an iron crowbar to open up the shipping route and using a tidal compass to determine the direction. Recruit seemingly ordinary partners with unique skills to create your own "Dawn Pirates". In the stormy waves of the Grand Line, stand side by side with Luffy and Zoro, and confront Hawkeye and Akainu.
In the smoke of war, he defeated the admiral of the navy with his mortal body, and used his self-created "sea control" ability to tear up the battlefield; in the game of the new world, he rose from the cracks of the Shichibukai, and won the crown of "Fifth Emperor" with his wisdom and strength.
When the coordinates of the final island of Ravdru appeared in the tidal compass, and when the secret of "ONE PIECE" was about to be revealed, Karen realized that what the system gave him was not a shortcut, but the right to rewrite his destiny with his own hands - in this sea called "freedom", every dream chaser can become his own king.