Inuyasha and company, including a old demon exorcist, travel to Demon's Head Castle, in search of a powerful demon plaguing the people.

Inuyasha battles a demon that has appeared in the castle. Shortly after they take their battle outside, Sango and the old exorcist decide to go find Miroku. Meanwhile Kagome and Shippo discover a secret about the princess in the lord's chamber of the castle.

Kikyo comes across an old man, who turns out to have a past connection with Onigumo when he was young.

Inuyasha and the rest of the group are passing by a village, and soon learn of three monkeys that are searching for their master.