Naofumi Iwatani, the shield warrior who defeated the four sacred beasts "Spirit Turtle", defeated Kyo Kyo, the culprit of the Spirit Turtle's resurrection in another world, and returned to Merlomag.　　He tries to prepare for a battle against the new Four Sacred Beasts "Phoenix" that is about to be resurrected, but the three heroes who lost in the Spirit Tortoise Riot are missing, and Iwatani Naofumi's territory is also in an uncertain situation.　　In order to retrieve the scattered inhabitants of the former Lulorona village and prepare for the upcoming battle, Naowen Iwatani visits Serutol, where the inhabitants are sold into slavery, and as a first step in rescuing them, Naomin joins the underground arena with Raphtaglia and Philo, the subhuman seeking redemption, the heartbroken three brave men, and Mai Yin lurking in the shadows When everyone's plots intersect Can Naomi Iwatani follow the path he believes in?