One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream!

The story begins on the pirate Zap's ship. His two members of his crew, Bonnie and Max, are tired and want to run away, but unfortunately, they have no money. Three children were being held captive on the ship overheard them. The eldest, Amanda, whose father was a pro treasure hunter, knows the whereabouts of a great treasure and offers them a deal. If they help them make a clean escape, they could take all the treasure they wanted. They agree, and the five of them barely escape and make it onto a small island where they meet Luffy and his crew. Unfortunately, they were pursued and Luffy and Amanda are captured and brought back to their boss, the head of the Bayan Pirates, who is also after the treasure. Luffy and his friends must fight the Bayan Pirates and find the treasure that Amanda's father left to the children. Amanda, who has always resented adventures and treasures, finally understands his feelings, as his father kept looking for adventures and treasures.