Ethan Carter, burdened with tens of millions of debt, unlocks Grandpa Carter's Ancient Seafaring Compass, which locates rare deep-sea treasures. He sells them for wealth, defeats Kael Rourke, and wins sea area exploitation rights. He discovers a secret in the compass, confronts the Sea Serpent Syndicate, and uncovers deep-sea treasures and his ancestors' past. He rises to become a deep-sea legend.
