The story is based on Robert Louis Stevenson’s Treasure Island novel. In the story, Doraemon, Nobita, Shizuka, Gian, and Suneo set out on an adventure in the Caribbean Sea. Nobita is the captain of a ship and fights his enemies on board. Shizuka gets kidnapped, and a storm impedes their journey. Mini-Dora help Nobita and friends on their journey. When the adventurers finally find the mysterious Treasure Island, they discover it is more than just an ordinary island.