Ibara and Aoi find the dog injured and Taeko taken hostage by a survivor. After being subdued, the survivor, Mitsuo Kawabata, asks for their help in finding his daughter Miku. Mitsuo brings the Coppelions to his underground home at a hospital where he lives with his daughter and wife Yukiko, where they managed to survive thanks to a ration truck that came every week. Mitsuo reveals he didn't call for help because he, Yukiko and his late wife, Miku's mother, were prisoners who escaped during the confusion of the meltdown. Believing Miku might be at her late mother's grave in a stadium, Ibara, Taeko and Mitsuo head there while Aoi stays with Yukiko. Meanwhile, Onihei learns that the radiation suit from the survivor they rescued has better protection than theirs. Ibara and Taeko discover Miku is not in the stadium and learns from Aoi that Yukiko has disappeared. After learning from Aoi that Yukiko went to prison for killing her own child and wants to be a better mother for her step-daughter, Ibara realizes that Yukiko took Miku hostage because she didn't want to leave Tokyo. After tracking Yukiko to a leaning hotel thanks to Taeko's dog, Ibara confronts Yukiko, who reveals she doesn't want the family to be rescued because she's afraid she and her husband will be arrested, leaving their daughter alone. After convincing Yukiko for her step-daughter's sake, half of the hotel collapses, from which Ibara is able to save Miku due to Yukiko's sacrifice. Hoping to get Mitsuo from the stadium, Onihei sends Ibara by helicopter but due to the stadium's dangerous radiation levels, Mitsuo slowly dies, while remaining grateful to the Coppelions who rescued his daughter. Before Onihei leaves with the girl, Aoi apologizes to Miku that they could not save her parents but they must go to find other survivors. Miku thanks Ibara and wishes her luck.