Hozuki Castle is a prison run by the Hidden Grass, well known for being notoriously difficult to escape from. Boruto and Mitsuki are sent there to protect Kokuri, a former member of a brutal band of robbers known as the Mujina Gang who's now targeted by assassins after betraying and deserting the gang.
Any criminal, no matter how evil,
can be rehabilitated.
أيّ مجرمٍ، مهما كان شرّيرًا، يمكن إعادة تأهيله
Jeder noch so schlimme Verbrecher
kann wiedergeboren werden.
Todo criminal puede renacer.
Todo criminal puede renacer.
Di qualunque crimine vi siate macchiati, 
potrete comunque rinascere.
Qualquer criminoso, não importa o
quão maligno, pode ser reabilitado.
Любой, даже самый гнусный
 преступник, может исправиться.