Kagome learns that Inuyasha is a half-demon, born of a human mother and a powerful dog-demon father. His older half-brother, Sesshomaru, searches for their father's grave and even summons Inuyasha's deceased mother from the afterlife. But the one who appears is a demon in disguise. Inuyasha is nearly consumed by her illusion.

Sesshomaru tries to kill Kagome for drawing the sword. Enraged, Inuyasha defends her, unlocking the sword's true form: a massive fang-shaped blade. Revealing his monstrous form, Sesshomaru battles Inuyasha—but is ultimately forced to retreat after losing an arm.