Sesshomaru comes to the Netherworld and engages in combat against Naraku. Hosenki challenges InuYasha to slay him in order to strengthen the Tetsusaiga and acquire the power to fight back against Naraku. Every time Sesshomaru splices the body of Naraku, his poisonous miasma is affecting everyone. InuYasha must choose between eradicating the miasma and slaying Hosenki. It is then that Hosenski realizes that InuYasha is selfless, giving him the power of the Adamant Barrage to shatter Naraku's barrier...