Ausgerechnet, als sich Pazifisten in Gefahr bringen, indem sie Sidonia den Rücken kehren, zeigt sich der Feind größer und aggressiver als je zuvor.
Nagate, Izana and Yuhata take a trip together to an inn and Nagate gets astonished to recognize Captain Kobayashi as the place's innkeeper. Once settled, Yuhata reveals that she obtained some info about Ochiai's secret lab and takes the others to investigate. The trio end up trapped inside the installations and take an elevator to a highly classified area where they are ambushed and sedated. Nagate awakens separated from the others and meets Yure, who reveals that the legends of Ochiai creating a Gauna/Human hybrid being are indeed true and is shown the corpse of the creature he developed using such method, from which they are manufacturing projectiles with a composition similar to the kabizashi and asks him to test the new weapon being developed from it. Meanwhile, Kunato also obtains info about Ochiai's experiments and come across a mysterious door, whose access are forbidden even to the members of his family. Nagate is sent back to the inn with Izana and Yuhata, who awaken with no memories of what happened and he feigns ignorance as well. Some time later, a colonization ship composed of pacifists who claim that if unarmed they will not be attacked by the Gauna, depart to settle on a nearby planet and Nagate is brought to Toha Heavy Industries, where both the new weapon and a new Guardian propulsion system is being developed, and reveals that the simulator they are using to make tests on both prototypes is the same one he used to train with his grandfather. When an alert of the Gauna approaching the colonization ship reaches Sidonia, Nagate offers himself to use the prototypes to reach the ship and defend it in time and Kobayashi accepts his request. Even having a hard time getting used to the new equipment, Nagate succeeds to reach the ship and destroy the Gauna before it attacks the colonists. After the mission, Nagate is called to EBD and cheers up when the Shizuka/Gauna hybrid uses a pen to write his name, before he is summoned by the Captain. On the way to br
Pasifistit vaarantavat itsensä jättämällä Sidonian taakseen. Viholliset ilmaantuvat taas, suurempina ja hurjempina kuin ennen.
Les pacifistes se mettent en danger en quittant le Sidonia, tandis que leurs ennemis débarquent encore plus puissants et nombreux que jamais.
I pacifisti lasciano la relativa sicurezza della Sidonia mettendo a rischio la vita, mentre le forze nemiche si mostrano sempre più aggressive.
基底湖に面した景勝地へ旅行することになった長道、イザナ、纈。気分転換のためにという纈だったが、本当の目的はある男が残したとされる研究施設の探索だった。
男の名は落合。第四次奇居子防衛戦ののちに処刑された科学者だという。
纈は研究施設の場所を突き止め、施設へ続く鍵を秘密裏に入手していた。
長道とイザナを連れて施設のある基底湖の底へ向かうと、最上位船員しか立ち入りが許されない最厳重警備隔離施設に意図せず辿り着いてしまう。
유하타의 안내에 따라 이자나와 함께 중력관이란 여관에 도착한 나가테. 그곳에서 오치아이가 남긴 연구시설을 찾아 기저 호수바닥을 탐험하게 되는데...
Nagate, Izana y Yuhata se toman un respiro en una posada, donde Kobayashi será su anfitriona. Después de investigar los alrededores de la posada, Nagate y los demás llegan a un lugar en donde no deberían estar...
Пацифисты подвергают себя опасности, покидая относительно безопасную Сидонию, в то время как враг появляется больше и свирепее, чем раньше.
