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.
But letting us live would 
serve no purpose for him.
.لكنّ تركه لنا نعيش لن يفيده بأيّ شيء
Pero no conseguirá nada
dejándonos con vida.
Pero no conseguirá nada
dejándonos con vida.
Ma per lui non ha senso lasciarci in vita.
Mas deixar a gente vivo
 não importa para ele.
Но оставлять нас в живых ему невыгодно.