Swept by the ocean waves, nine kids find themselves on a remote island where they meet one-eyed pirate who owns the island and promises to bring them back to their family. On the journey in the sea, the ship of one-eyed pirate is attacked by bad pirate Nipon, so the kids want to help one-eyed pirate redeeming his prestige and defeating pirate Nipon. But, the most challenging thing is they're in quest for the treasure island where mythical creatures, such as giant turtle, giant crab, and giant octopus are guarding the treasures.