Lin En, a recruit from the East China Sea, accidentally got involved in the conspiracy between the top brass of the Navy in Rogge Town and the mysterious force "Sea Serpent Chamber of Commerce", and discovered that they were trying to get their hands on ancient weapons nodes. In order to reveal the truth, he teamed up with Captain Tina, who insisted on justice. Under the threat of betrayal, pursuit and strange sea monsters, he survived on the mist-shrouded Kirigakure Reef, and gradually uncovered an ancient secret that could subvert the world structure.
