Koumi's Isle, a Gorgeous island in the Pacific Ocean. On the island, most people pass an old legend from generation to generation that there was an ancient ruin, the sea-bed Palace at the base of the sea, where the treasure of 2 female pirates. Mary Reed (who really existed 300 years ago), has been lefthanded. They meet with any treasure hunters After Conan and his associates visit Koumi Island while on a break. There is something funny .