In feudal Japan, the half demon Inuyasha was sealed away by the priestess Kikyo. Many years later he is revived by Kagome, who has slipped through time from the present day. Kagome is surprised when the sacred Shikon Jewel, which makes demons stronger, emerges from a cut on her body.

Hoshiyomi plans to destroy humanity using the Naginata of Kenkon.

A parasite demon infects Shippo, causing him to attack his friends, but Inuyasha seems to be the Shippo's real target.