InuYasha, realizing that the Netherworld is the grave of his father Inu no Taisho, goes to see Myoga, who tells him that he must go to see Hosenki in order to visit the Netherworld. After climbing a cliff, InuYasha encounters Hakudoshi, who is aware of who Hosenki is. The protagonists soon meet Hosenki, whose father has died of old age. Even though his father was the creator of the Black Pearl in InuYasha's right, Hosenki is only the apprentice as such...