During the Ming Dynasty, the chief of the fleet , Yang Lie led the fleet to travel secretly to the East Sea. In the stormy situation while being attacked by the Sea Dragon they were rescued by Xiyin and brought to her home the dream-like Penglai Xian Island Yang Lie was fascinated by the treasures of the island and after a while stern man and the kind and innocent mermaid Xiyin slowly started developing feelings to each other while confronting the dark forces that threaten the island.