The second part of Nanbaka. The prisoners and their guards continue their comfortable lives at Nanba Prison. However, from the shadows emerges a new threat: Enki Gokuu, a person from Samon's past, who has mysterious goals of his own.
Jyugo escapes from prison again and Hajime Sugoroku goes looking for him, but it’s a usual day for the inmates and guards. Many things have happened, but it seems like nothing has changed in Nanba Prison.
A new guard has come to Building 13, and not everyone is happy about it.
Yamato takes Rock and Tsukumo to Building 5 for training. Rock challenges Samon to a duel, but he is defeated by only one finger.
Rock and Yamato suddenly become violent after returning from Building 5 and attack Jyugo and Seitarou. Covered in bruises, Jyugo tries his best to protect Uno and Nico.
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 the level 1 underground cell. There, they find the captured Upa and Liang.
Jyugo, Uno, Nico, Liang, Upa, Honey, and Trois make their way through Building 5's underground cell to find the captured guards. They hide in the file room where Jyugo finds some shocking information about himself!
The escaped convict, Hachiman, appears in front of Liang and Upa. Meanwhile, Uno and Jyugo are concerned about Nico, who doesn’t have his medication. It seems something horrible will happen to him if he doesn’t take his medicine.
Uno explains to Honey and Trois that when Nico's medicine wears off he goes out of control. As Nico's alternate persona awakens, he fights Hachiman. In the meantime, Liang and Upa restrain Daisen Rokuriki and destroy his talisman. Qi interrupts the fight and while Nico attacks him, he injects Nico with his medicine, rendering him unconscious. Hachiman feels as though he has won, however, to his, Liang, and Upa's surprise, Qi injects poison into Hachiman's leg. While Hachiman is unconscious, Upa, Liang, and Qi talk. Hachiman eventually regains consciousness, and tries to fight the trio, but he's taken down by a group attack.
Upa wonders if someone other than Enki is involved in the situation. Meanwhile, Jyugo and his group reach level 2 where they are confronted with numerous Jiang-Shi dolls. As Trois explores the area, they encounter Ruka Gojou and other guards with talisman on their foreheads, Daisen Kokoriki and Daisen Youriki. Trois tries to defeat him with a handmade a flame-thrower he made with leftover parts. Just as they think they are free, Ruka Gojou appears and captures Jyugo.
Jyugo has been captured by Ruka Gojou, but is saved by surprise attack from Trois. Honey gets frustrated with Jyugo's uselessness and wants to leave him behind. Eventually, Ruka, Daisen Youriki and Daisen Kokoriki catch up to the group and Jyugo is caught by Youriki. While trying to help Jyugo, Uno is restrained by Ruka. Though initially reluctant, Honey decides to help. The two inmates of Building 3 decide to repay their debts to Jyugo and Uno, and deal with Ruka and the Daisens. After managing to subdue them, Ruka surprisingly comes out unscathed, now prepared to fight them seriously.
As Ruka begins to fight seriously, Trois and Honey pursuade Uno and Jyugo to go ahead while they continue fighting but Jyugo eventually returns and defeats Ruka with his blades. Kokoriki and Youriki later arrive and try to arrest the escaped inmates. As they escape, Uno, Honey and Trois come up with a plan while Jyugo begins to make his way to Hajime.
Enki realises the prisoners have escaped as Mitsuru and Kenshirou begin questioning the situation. Meanwhile, Trois and Honey free Kiji who takes care of Daisen Kokoriki and Daisen Youriki before defeating Ruka. Jyugo finally finds Hajime before freeing him and Samon from their cells. Kiji handcuffs the inmates, but they are suddenly confronted by a hoard of surveillance dolls as are Jyugo and Hajime.