The story takes place sixty years after the end of Inuyasha's story. At this time, the King of the West retired, Sesshomaru had returned to the West Country to take over the position of lord, and Inuyasha also returned to the West Country after Kagome's death. The death of the woman they loved deeply caused them to share a common heartache and their relationship eased.
After Naraku's death, the evil monsters scattered around were gradually eliminated by the monster leaders who ruled the three kingdoms of the West, South, and North, and the pattern of the Three Kingdoms gradually formed on the mainland. The legendary Nekomata clan living in the underworld also reappeared in the world after the underworld split and became the leader of the Northern Kingdom.
At this moment, a new crisis approached. What kind of bloody storm will the demons from the bottom of the underworld cause in the world? As the lord of the Western Kingdom, how did Sesshomaru establish his own path of dominance...