While cleaning out some books from the store room, Ushio stumbles upon a door. Upon opening it, he finds a beast inside, which is stuck because of a spear holding it in place. The beast asks him to remove the spear, since only a human can do it. But since he says that he'll eat Ushio and wreck havoc among humans, Ushio doesn't help him. The beast's aura leaks, attracting many other yokais and Ushio is forced to free him to exterminate all the other yokais.

While at the beach, Tora is requested by Umizatou to get rid of a yokai whom he is unable to subdue. The yokai is made of souls of those who died at sea and it is eating both humans and yokai. Tora gets caught when the yokai tried to eat him. Asoko and a little kid get trapped too. Its up to Ushio to save them.

After parting with the Kamaitachi siblings, Tora and Ushio head to their next destination Touno. On the way however they are attacked and separated by youkai who wish to kill Ushio. A conversation with a friendly kappa youkai reveals that the true reason is his mother and tells a story of Hakumen no Mono, a ruthless human and demon-killing youkai from China that retreated from a war with both factions long ago. Before he can finish with the truth about his mother, Ushio must flee from the attacking youkai once more. Elsewhere, Tora struggles to understand why he's changed so much when challenged by a fellow youkai past, Hitotsuki, one who is part of the group hunting Ushio.

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

Mayuko is invited to a strange dinner party and Tora eats crab gyoza burgers.

A mysterious ghost appears in front of Atsuzawa and calls herself Jie Mei. She says she has a favor to ask him in regards to Hakumen no Mono... Meanwhile, Ushio and Tora are asked to come meet some people who want to see them. While they are on the way to meet these people, they run into Nagare, and Ushio can't hide his surprise. The happy reunion is cut short by some shocking news...

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

Hakumen crushes its eyes itself to overcome the fear of the Beast Spear. Tora wants to save all the people even if it has to sacrifice itself, and tells the strategy to Ushio.