One Piece: Heart of Gold

In this prequel to the film One Piece Film: Gold, the Straw Hat Pirates meet Olga, a girl who has escaped from the long-vanished island of Alchemi. The island was famous for its metallurgical workshops and its production of extremely valuable pure gold, yet it had been considered lost for two centuries. Olga is being pursued by the Marines, who are keen to get their hands on that gold, adding tension to her journey.

Gild Tesoro, a powerful player on the black market, learns about Olga and hires the treasure hunter Mad Treasure to track her down. Luffy's crew decides to team up with Olga in the search for the pure gold. Olga, however, has plans of her own: she intends to use the pirates to reach her goal of getting rich with the treasure once it is found. This alliance promises to be full of adventure and unexpected twists.