One Piece: Heart of Gold

The Straw Hat Pirates cross paths with Olga, a sharp-tongued girl hunted by both the World Government and the treasure hunter Mad Treasure. She alone possesses the clue to Pure Gold, a legendary substance said to be valuable enough to buy the entire world.

The search leads Luffy and his crew to Alchemi, a vanished island hidden inside the enormous anglerfish Bonbori. While Mad Treasure closes in, Olga must confront the secrets of her past, and the Straw Hats must survive a dazzling hunt for a treasure whose true value reaches far beyond money.