In order to defeat the demons, Sango coats Hiraikotsu with poison. To cleanse it of the poison, the Master of Potions says she must defeat the demon inside the jug. Sango takes on the challenge. Meanwhile, the Master of Potions asks Miroku, whose Wind Tunnel is causing him pain, whether he would like a painkiller…

Shishinki, the Ogre of Death, appears before Sesshomaru, telling him that Inuyasha and Sesshomaru’s father stole his Meido Zangetsuha in a battle. Shishinki says that Tenseiga is an incomplete sword that is merely a cast-off piece of Tetsusaiga, and that Sesshomaru will never be able to perfect Meido Zangetsuha. Then, a secret involving Inuyasha’s Tetsusaiga is revealed!

Sesshomaru is enraged when he learns the secret behind Tenseiga. Totosai tries to persuade Sesshomaru that he will surpass his father once he is able to abandon his attachment to the sword as well as his hatred of Inuyasha. Meanwhile, Naraku relentlessly chases after Kohaku’s Shikon shard and learns that Kikyo left behind something worth fearing.

Sesshomaru steals Tetsusaiga’s power with Tenseiga, empowered by Kanna’s memento, a fragment of the Mirror Demon. Inuyasha turns into his demon form and tries to attack, but Sesshomaru fires his Meido Zangetsuha. Will Inuyasha, the alleged heir to Tetsusaiga, be cast off to the Underworld?

The priestess Hitomiko lost her life at Naraku’s hands. But she comes back to life and locks Kagome within a barrier. Then, the true spiritual power of Mount Azusa’s bow reveals itself!

Inuyasha and Kaede try to find out what is sealing off Kagome’s powers. Meanwhile, the Shikon Jewel’s evil will, Magatsuhi, borrows the body of Naraku’s demons and attacks Sesshomaru’s group, causing Totosai to sense that Sesshomaru is in serious danger!

Kohaku remains unconscious after being stared down by Magatsuhi, the evil will. Kagome is worried, but she has to buckle down and study for her entrance exams, so she decides to return home. But on the day of the entrance exam to her top-choice high school, Inuyasha comes to get her. Will Kagome make it to her exam?

Sesshomaru chases after the evil will, Magatsuhi. But it’s only part of a trap set up by Byakuya of the Dreams. Magatsuhi finds Kohaku lying unconscious, and he tries to deliver his Shikon shard to Naraku. Miroku tries to stop him by sucking the evil will with his Wind Tunnel, but doing so causes him to collapse. In the meantime, Sango and Inuyasha try to catch up to Kohaku…

Naraku is after the last Shikon shard, and he takes Kagome hostage. Inuyasha’s gang engages in battle. Kohaku uses Kagome’s Sacred Arrow and Kikyo’s light to fight Naraku, but his Shikon shard is stolen in the process, and he breathes his last. Sango is overcome with grief...