The Underprison

Petty criminals and those who can be rehabilitated are typically held in an above-ground jail until their release. However, those whose crimes do not warrant execution but who can not or will not be reintegrated into society are thrust into the vast, multi-level underground prison of Kumogakure. Here, there are no guards, no rules, and no means of escape. Every day is a struggle for survival, but with the right abilities, determination, and luck, a prisoner may become very powerful indeed in this dark world.