The Kokujou with the Hunters is refused entry to Iwato Station, the last before Kongokaku, by the shōgun's samurai. Ayame decides to part company with the Hunters and asks Ikoma to get Mumei. Lord Maeda, leader of the fortress agrees to a meeting with Biba on the condition that only women and children accompany him. During the meeting, Mumei leaves the meeting saying that she needs to go to the toilet and lowers the Iwato Station's drawbridge to let Biba's Kabane into the station. Biba then kills Lord Maeda. When Mumei sees the Kabane attack the station she is horrified by the consequences of her actions. Meanwhile Biba's men take Ayame hostage and kill the shōgun's samurai for what Biba says is retribution for the shogunate's cowardice for the past 10 years. He believes that only the strong should survive. Biba injects his Kabaneri Horobi with a serum so that she can become the heart of another Black Fog beast, gathering all the Kabane into a single colony, a Nue. The Nue is defeated, but Horobi survives and continues to fight. When she reaches Biba, he kills her since she has served her purpose. In the aftermath, Biba and his men control a devastated Iwato Station. Mumei then realizes that everything Biba had told her was a lie.