Upon hearing about the story of Treasure Island, Nobita dreams of discovering and exploring his own treasure island, despite the fact all of the Earth has been mapped already.
Kid, a 15-year-old hard laborer, steals a map that promises to reveal the location of the notorious pirate Black Mor's treasure. Together with his crew -- MacGregor, Beanpole, Taka and Jim the monkey -- Kid procures a vessel and sets out to sea.
Enchanted by the idea of locating treasure buried by Captain Flint, Squire Trelawney, Dr. Livesey and Jim Hawkins charter a sailing voyage to a Caribbean island. Unfortunately, a large number of Flint's old pirate crew are aboard the ship, including Long Jane Silver.