The Straw Hat crew salvages a treasure chest from a sinking wreck, inside which they find an old lady. To get the pirates to take her home, she promises them the treasure of a golden crown on her island: Mecha Island. Upon arrival, the crew is attacked by the lord of the island but he has a change of heart and decides to seek their help to solve the mystery of the Golden Crown. (Source: ANN, edited)

A girl named Olga is pursued by both the World Government and a man named Mad Treasure, as she is the only one who knows the location of the Pure Gold, a substance that can buy the entire world. Olga ends up sailing with the Straw Hat Pirates, and they journey to find the Pure Gold on the lost island of Alchemi, which is located inside the stomach of a large angler fish named Bonbori. (Source: IMDb)

Nami betrays the Straw Hat crew and steals their ship and treasures, escaping to Arlong Park. Luffy and his crew follow her, only to come face to face with the infamous pirate Arlong, a ruthless fish-man who has taken over Nami's home island with force and Naval bribes. As opinions clash and the Straw Hats attempt to convince Nami to rejoin the team, her true motivation behind the deception will be revealed at last.

According to Weekly Shonen Jump, 3D movies of One Piece and Toriko were announced to premiere on March 19th, 2011. One Piece 3D is an original story about the missing straw hat of Luffy.