Fisherman Finn Palmer possesses the Oracle Eye, seeing through the deep sea. Betrayed by his partner, he leads his old crew into a deadly sea area, catching a priceless lobster king with his Oracle Eye. Facing a blockade by the port's overlord, Lord Donovan, Finn Palmer awakens the ultimate power of his Oracle Eye. He uncovers a massacre truth from twenty years ago, protects an underwater ancient city, and becomes the Dragon King of the Seas, guardian of the ocean.