On the beautiful island of Asuka, there is a legend that thousands of years ago, the islanders were extremely afraid of the appearance of the red full moon. In order to eliminate the panic, God gave the king of the island a shield and a seven-star sword. However, when the seven-star sword and the red full moon appear at the same time, darkness will dominate the entire earth. The Straw Hat Pirates, who temporarily settled on Asuka Island, were hunted by the navy, and Zoro, who was originally guarding the ship, disappeared strangely. At Nami's insistence, everyone returned to the island, but came to a strange place, and then met Maya, a beautiful girl holding three beautiful jades. On the other hand, Zoro reunited with his former ally Saka at the naval dojo on the island. Because of Maya, Zoro and Sanji fought. And all this is related to the Seven-Star Sword in Saka's hand. The secrets hidden in this legendary sword gradually surfaced...