Naraku steals the Fuyouheki, an orb which conceals demonic auras, from a mountain demon named Gakusaijin, who then sheds parasite chrysalis demons. Meanwhile, InuYasha and his companions purify a fox deity possessed by a parasite chrysalis demon in a town. Another parasite chrysalis demon possesses Shippo, which later causes him to attack his friends and the townspeople with his devious fox magic. InuYasha manages to detach the parasite chrysalis demon from Shippo. The parasite chrysalis demons are destroyed, upon realization that Naraku was behind all of this.