It had been a year since the defeat of Naraku. Miroku, Sango, Koga, and Ayame had all gotten married, and unknown to Kagome, if all went well, she and Inuyasha were on their way. Rin had only decided to join Sesshomaru and Jaken a month earlier.
Shippo had been getting very strange dreams. In them, he saw himself, looking into a mirror, but instead of his regular body, he saw himself in fox form, which he rarely ever took, despite having the ability. He was also much larger, barely fitting into the mirror. When he turned aound, he saw Inuyasha. In a flash of blue light, Inuyasha was replaced by somebody who, for the most part, looked like Sesshomaru. Shippo had seen this dog demon in a painting kept in Kaede's house, it was Inuyasha's father, Inu no Taisho. Shippo looked back into the mirror, seeing himself as he was. Inu no Taisho vanished.
Koga slept in his and Ayame's bed, in the Wolf Demon Castle, having a odd dream. He stood on a platform, with Ayame by his side. She looked to him, turning into a child. She then turned into child, and then she vanished completely. As she did, he saw Inuyasha in her place, and then his brother Sesshomaru took his place. Another man appeared in resemblance to Sesshomaru, who Koga assumed knew him. As Ayame had, Sesshomaru turned into a child, and the other man put his hand on the young boy's head. Koga then bowed, and the dream ended.
Sesshomaru had been very odd dreams. His father stood before him, wielding all of the blades he had created. He struck Sesshomaru with the Tessaiga. He could not move and it appeared as if he would soon bleed out. His father drew Tensaiga, and in a flash of light, the dream ended.