Nach dem Verrat von Yahiro wird Shu von der GHQ unter Terror-Verdacht festgenommen. Gai und die Undertaker versuchen, Shu aus dem GHQ Hauptquartier zu befreien.
Shu is arrested by the GHQ much to his classmates shock and worry. He is sent to GHQ Isolation Facility Four where he remains silent about the Undertakers. Upon learning Gai and the Undertakers will attack the Facility to rescue their "comrade", Major Segai brings Shu to the Isolation ward, revealing Yahiro sold him out so his brother, a victim of the Apocalypse Virus, can get treatment. Furthermore, Major Segai justifies GHQ's harsher actions for the safety of Japan and uses Shu's feelings for Inori and his doubts about Gai. He reveals that the "comrade" Gai wants to rescue is mass murderer Kenji Kido, which makes Shu question Gai's trustworthiness. The Major gives Shu a transmitter disguised as a pen that he is to use if he comes in contact with Gai. Later that night, a disguised Gai visits Shu and tells him his plans to rescue Kenji, however, Shu doesn't want to be involved. Tsugumi informs the two that Inori has disobeyed Gai's orders to stand by in order to rescue Shu. Shu, worried, goes to save her, forcing Gai to change his plan. Protected by Ayase's Endlave Steiner, Shu heads to where Inori is at until he encounters Kenji himself and uses his Void, a Gravity gun to stop the GHQ Endlaves and rescue Inori. After Isolation Facility's destruction, Gai offers Shu to follow him. Shu reluctantly agrees, however, he keeps the transmitter given to him and does not inform Gai of his exchange with the Major.
Yahiro trahit Shuu et le livre aux Anticorps du GHQ. Le commandant Segai explique à Shuu le rôle de bienfaiteur du GHQ dans la crise mondiale de ces dix dernières années. Ainsi, il espère retourner le lycéen contre les Croque-morts. Au même moment, les rebelles annoncent qu'ils comptent faire s'évader le responsable d'un attentat gardé dans la même institution que Shuu...
谷尋（ヤヒロ）の裏切りによって、テロリストと関わった容疑で収監されたシュウ。
彼を捕らえたＧＨＱの将校、嘘界（セガイ）少佐は、葬儀社のテロリストたる悪性や、ＧＨＱの善意を語り、シュウの心を揺さぶり続ける。
一体誰を信じたらいいのか？ 思い悩むシュウをよそに、葬儀社は収容所に襲撃を仕掛け、囚人の脱獄作戦らを敢行する。
誰の真実も見えない中、選択を迫られるシュウ。そんな彼の前に現れる、たった一筋の光明。
――そのとき、シュウは一つの決断を下す。
GHQ에 붙잡힌 슈는 배신당했다는 생각에 좌절하며 입을 굳게 다문다.
세가이 소령은 슈를 휘유하여 장의사를 일망타진할 생각에 심리전을 걸어오는데...
가이를 위시한 장의사는 지하에 갇혀 있는 동지와 슈를 구출하기 위해 격리시설에 공격을 가한다.
Le piden ayuda a Shu para capturar a Gai, mostrando que solo el es una herramienta más para las fechorías de Gai; y si Gai vendría no sera para rescatar a Shu si no a un asesino que esta encerrado. Shu no sabe en quien confiar, ya que con Gai nunca tuvo las respuestas a sus inquietudes.
因為谷尋的背叛，讓集因為涉嫌與恐怖份子接觸而被拘留。逮捕集的 GHQ 噓界少校，巧妙地利用言語不斷動搖集的內心。「我到底該相信誰？」正當集苦惱不已之際，葬儀社決定進行劫獄的作戰計畫。在真相不明卻又面臨選擇之時，集的眼前出現了一絲光明。就在此刻，他下定了決心。
Per via del tradimento di Yahiro, Shu è sospettato di terrorismo e imprigionato e si chiede se deve credere a Segai della GHQ. La prigione viene attaccata.
Po zdradzie Yahira podejrzany o terroryzm Shu trafia za kratki. Zastanawia się, czy może zaufać Segaiowi z GHQ. Tymczasem ktoś przypuszcza atak na więzienie.
