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 physically impossible to escape from 
the underground cell in the first place.
من المستحيل الهرب من الزّنزانة 
.التّحأرضيّة من الأساس
Allein aus diesem Kerker zu entkommen,
ist physisch unmöglich!
Y es físicamente imposible
abandonar el calabozo…
Y es físicamente imposible
abandonar el calabozo…
Et physiquement parlant,
s’enfuir du cachot est infaisable.
Soprattutto, è fisicamente impossibile
scappare dalle celle sotterranee.
É fisicamente impossível fugir das
 celas subterrâneas, para começar.
Более того, из подземной тюрьмы
физически невозможно сбежать.