Naraku attacks and fatally wounds Hitomiko, a priestess with unusually strong and powerful spiritual powers and abilities that he previously tried to kill fifteen years ago. Using the Shikon Jewel, he keeps her alive and uses his spider webs to control and manipulate her. He has her erect an incredibly strong and powerful barrier that traps Kagome, and begins torturing her to death. Kagome shoots the spider controlling Hitomiko, though she worries this will corrupt Hitomiko’s soul and spiritual powers. When she fires her arrow, a huge light purple glowing ray of intense spiritual power shoots out and Hitomiko is able to die peacefully in Kagome’s arms, after first telling Kagome that she can sense that Kagome’s true spiritual powers are highly extensive, but are somehow sealed.

Using the fragment of Kanna’s mirror, Sesshomaru is able to make Tenseiga replicate Tetsusaiga’s powers and abilities and challenges InuYasha to a battle to test his worthiness to wield their father’s fang of destruction. InuYasha accepts. Every time the swords cross, Tetsusaiga regains some of its powers and abilities back. Sesshomaru creates a Meido that swallows InuYasha, and throws Tenseiga into it. Naraku tries to control Tenseiga through Kanna’s mirror. Sesshomaru jumps in the Meido and forces InuYasha to break Tenseiga. Tetsusaiga becomes black, and InuYasha creates a Meido to come back from the netherworld. The broken Tenseiga comes back anew. Totosai said that, now freed from his obsession with Tetsusaiga, Sesshomaru is one step away from obtaining a much stronger and much more powerful weapon of his own that was not inherited from his father.

Totosai confirms that Sesshomaru’s father gave him Tenseiga so Sesshomaru could perfect the Meido Zangetsuha, then have Tetsusaiga reabsorb Tenseiga. Meanwhile, Naraku takes advantage of Sesshomaru’s absence to try to take Kohaku’s Shikon Jewel shards, and is annoyed to find that it is still being protected and purified by Kikyo’s spiritual powers. InuYasha’s group arrives and Naraku tries to taunt Sango by claiming Kohaku runs from her to forget his past. She states that she already knew that, but will still fight for him when he needs her. She attacks with Hiraikotsu and to her surprise, it now has its own demonic energy and it is able to injure Naraku. InuYasha follows up with an Adamant Barrage attack, Kagome fires one of her sacred arrows, and Miroku attempts to use his Wind Tunnel, but the severely injured Naraku manages to flee. Afterward, Kohaku tells them that because his jewel shard is still pure, they may still be able to use in the final battle with Naraku.

The demon Shishinki approaches Sesshomaru for a fight, having been defeated by Sesshomaru’s father long ago. To Sesshomaru’s surprise, Shishinki attacks him using a complete Meido Zangetsuha and claims Sesshomaru’s father stole the technique from him. Sesshomaru attacks with his Meido, but Shishinki’s absorbs it. InuYasha and his group arrive and after Shishinki attacks him, InuYasha joins the argument. Shishinki taunts Sesshomaru, telling him that he must have been shunned by his father if his younger half-demon, half-human brother has Tetsusaiga as Tensaiga is just a cast off from it to contain the unneeded Meido. As Sesshomaru furiously wonders why his father did this, Shishinki attacks again. InuYasha protects him with the Wind Scar, but Sesshomaru punches him and tells him not to interfere. Sesshomaru blindly charges Shishinki. Miroku uses a paper charm to fire Myoga at InuYasha so he can explain to Sesshomaru that his father entrusted him with the Meido because he felt Sesshomaru could master it, however Shishinki points out that he could have just given him Tetsusaiga instead of casting off Tenseiga. Sesshomaru resumes his attack. When InuYasha again comes to his aid, their swords begin pulsating. When Sesshomaru draws Tenseiga, he is able to launch a massive complete Meido that swallows Shishinki. InuYasha tries to tell Sesshomaru that Shishinki was lying, and that Tenseiga is a proper keepsake, but Sesshomaru states that they are destined to fight one another for the rest of their lives. Myoga states Sesshomaru must have realized his father’s true intentions.

During a new moon, Sango and Miroku face off against a Bone-collecting demon. During the battle, Miroku is forced to use his wind tunnel twice, resulting in his being poisoned. To protect him, Sango coats her hiraikotsu in poison and uses it to destroy the demon, destroying her weapon in the process. Myouga suggests they visit the Demon Master of Potions to have it repaired. The drunken man agrees to repair it and dumps it in a jug of alcohol, dissolving it. He sends Sango into another jug to pacify the demons inside. The demon’s are the Hiraikotsu which want Sango to promise not to betray them again, but she refuses, saying that as she loves Miroku, she would sacrifice her life for him. Outside the jar, the Master of Potions offers Miroku a poisonous drink that will prevent him from feeling the pain of any other poison or demon miasma, though it will not actually prevent it from reaching his heart. The hiraikotsu initially intends to kill Sango, but Miroku drinks the poison so he can continue to protect Sango. The Hiraikotsu demons agree to fight with her once again, and Sango’s weapon is fully restored, and is now much stronger and much more powerful than ever before.