Ushio sees a girl at an onsen. Later he saves her from an accident. She is Saya Takatori, the white haired girl, who is guarding the Zahiki Warashi of the Takatori house, Omamori, from leaving so that the house remains prosperous.

Ushio is staying at the Kamaitachis' house when he sees Asako calling out Mayuko with a face full of fright. After asking a mirror elder, he comes to know that a mirror demon has kidnapped Mayuko inside the mirror.

As Ushio turns into a monster, all the people he has met and saved gather to save him. Jie Mei gathers the five girls Ushio has strong bonds with - Asako, Mayuko, Reiko, Saya and Yū to save Ushio. They are to comb Ushio's hair using the comb that his mother gave him, to return Ushio back to his human self.

After the girls finally manage to save him, Ushio enters the cave where Hakumen no Mono resides along with Tora.

Ushio, anxious over the approaching decisive battle with Hakumen, runs into Asako on the way home from school and ends up arguing with her as usual.

Upon getting a premonition that the Beast Spear would break, the yokai chiefs from all over make a collective decision.

After being tricked by Hakumen no Mono, the JASDF prepare to send subs to destroy the stone pillar where Ushio's mother is, as she keeps Hakumen sealed. Ushio heads to Okinawa to stop them, but runs into Nagare, who seems to have switched sides. Ushio leaves Nagare to Tora, and hurries to stop the subs. Nagare and Tora go all out in battle, and Asako finds out a secret about Ushio...

Ushio heads to the stone pillar in order to save his mother from Hakumen no Mono. He approaches her quietly in the cave and she softly calls his name. They get to share a heartwarming moment together, but then a terrible sound interrupts their reunion. Torpedoes break through the barrier, and then...

Kirio tells Sumako and Mayuko that he found out something about the past of Tora and other Azafuses. Meanwhile, small pieces of the Beast Spear save Ushio from the bottom of ocean, and then, they kill Hiyou which has possessed billions of minds.

Ushio and Tora confront Hakumen again. Hyou makes a duel with Guren to revenge his wife and daughter.