Hajime, Jyugo, Uno, and Nico head to Building 5 to find out about Rock and Yamato.
Jyugo and the others fall into a trap and end up in level 1 underground cell.
There, they find the captured Upa and Liang.
Meanwhile, Hajime is captured by Inori and is escorted to the underground cell where Samon, covered in injuries, is restrained.
Samon reveals who’s behind the incident.
It is no other than Enki Gokuu, the former Building 5 supervisor who became a criminal causing havoc in Nanba Prison in the past. He is also Samon’s brother.
It's natural to think he was 
captured on the surface
من الطّبيعيّ أن نفكّر أنّه أُسر على السّطح 
وتمّ إحضاره إلى مكان ما هنا، صحيح؟
Der einzige logische Schluss ist, dass er oben
geschnappt und hier runtergeschleppt wurde.
Lo más lógico es que lo capturaron
y lo trajeron aquí abajo, ¿no?
Lo más lógico es que lo capturaron
y lo trajeron aquí abajo, ¿no?
C’est logique, ils l’ont capturé
puis l’ont enfermé au sous-sol.
È ovvio pensare che sia stato catturato
in superficie e portato quaggiù, no?
É claro que ele foi 
capturado na superfície.
Явно же, что его поймали наверху