Upon healing her wounds inflicted by Naraku, using Midoriko’s soul, Kikyo runs into Inuyasha again and reveals the secret to destroying Naraku. Meanwhile, Koga gears up to retrieve the ultimate weapon, the Goraishi, at the wolf demon tribe’s burial ground. Around that time, Moryomaru, who faced off against Sesshomaru, detects the smell of Kagura’s blood…

It is the day of the annual Fox Demon Promotion Exam. Miroku and his friends get stuck taking the tests. Shippo makes fun of Inuyasha and climbs in rank. In the meantime, Totosai decides to forge the Tenseiga again upon visiting Sesshomaru. The Tenseiga is a source of great power during battle, and Sesshomaru learns a few new tricks.

The swordsmith Toshu forged a demon-blade using one of Ryujin’s scales, and the Dakki was born. Every time Inuyasha tries to attack, he is undermined by demonic energy. The wielder of the Dakki is trying to steal the Tetsusaiga’s demon power. Will Inuyasha be able to win against the Dakki!? In the meantime, Koga faces off against Moryomaru in an attempt to save the children of the Wolf-Demon tribe who had been afflicted by the poisonous moth.

The Tetsusaiga has attained the power of the dragon scales. In order to be able to quickly use the demonic power well, Inuyasha has no choice but to go through training. Totosai tells Inuyasha to go see the Great Holy Demon Spirit, but when the group arrives, they find that the Great Holy Demon Spirit has had his liver taken by a demon, and all of the villagers have turned into demons.

Inuyasha and Koga arrive at the scene of Moryomaru and Naraku’s fight. But Moryomaru, who wants his Shikon shards, catches Koga. Meanwhile, Naraku draws up a secret plan to intimidate his heart, the Infant, residing within Moryomaru. What will be the outcome of their confrontation…?

Kikyo has been contaminated by Naraku’s spider web. In order to save her, Inuyasha and Kagome need the bowstring kept in Mount Azusa’s mausoleum. Kagome rushes off to Mount Azusa to retrieve the bowstring and save Kikyo. Meanwhile, Sesshomaru appears before Byakuya of the Dreams, who is on a quest for Kohaku’s Shikon shards.

Kikyo tries to purify Naraku and his Shikon shards. She also tries to purify Midoriko’s will that controls the shards in Koga’s legs. Kikyo tells Kagome, “Protect the last shard, Koga’s light,” but what are her real intentions? And can Inuyasha protect Kikyo from Naraku?!

Sesshomaru asks his mother how he can expand Tenseiga’s Meido, the Path to the Underworld. In response, his mother uses the Meido stone that Sesshomaru’s father gave her. However, Kohaku and Rin are swallowed by a giant dog and are taken away to the Path to the Underworld. Sesshomaru chases after them and steps foot into the Meido , from which there is no coming out alive.

The Flower Prince is a demon that feasts on saddened or anguished hearts. Dazzled by the flower’s fragrance, Inuyasha is entangled in a fake dream. Kagome shoots the Flower Prince with an arrow adorned with the Beads of Demon Repulsion, but… Plus, the Mirror Demon and Kanna are on the move.