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.
The gang is back to their usual antics and things have returned to normal in Nanba prison. However, the status quo is upset when a former guard turned inmate enacts a plan of his own.