The fight on the ship continues: Yagen Toushirou gets into trouble on the open sea, when a well-known ally, Tsurumaru, appears. And when Kanesada and Mutsunokami join them, it briefly seems as if the second division has brought the situation under control. But then a second warship appears... While an almost hopeless naval battle rages on the water, Tonbokiri and Kunihiro have to face the all-powerful Otachi on land. This monster, which has caused suffering and destruction, cannot be countered by the human villagers. But much more than the protection of people, the mission of men is to preserve the passage of time, and for this one or the other painful sacrifice must be made.