Without his shards, Koga takes Ginta and Hakaku and retires from fighting Naraku, leaving desire for revenge to InuYasha and his group. Meanwhile, Sesshomaru visits Inukimi to asks how he can make Meido Zangetsuha even stronger and even more powerful than ever before. She summons a Hellhound from her Meido Stone for her son to battle, which takes Rin and Kohaku into the void of the Underworld. Sesshomaru follows and defeats the Hellhound to rescue them. Though Kohaku can move in the void due to the shard, Rin is not. When Kohaku informs Sesshomaru Rin has stopped breathing, he stops shocked. The Abyssal Darkness envelopes Rin and Sesshomaru confronts the underworld guardian to rescue her, but Rin dies with no mercy. Sesshomaru uses Tenseiga to purify the carcass in the Underworld, and brings himself with Rin and Kohaku back to the physical world. Inukimi is surprised Sesshomaru isn't happy Zangetsuha's darkness widened, he more is disappointed of Rin's death, and is disturbed now learning Tensaiga can only be allowed to bring a person back from afterlife once. After scolding Sesshomaru thinking he was a god, who could control life and death themselves, she revives Rin using her Meido Stone, but warns Kohaku and Rin they are alike, knowing their lives can't be saved by Tenseiga again.