Nanba Prison is unlike any other. Not only because it is the securest prison in the world, but also because of something else.

Cheryl Fukada is the first female inmate who was sent to every prison in 7 different countries and only escaped when she grew bored w/o any inspirations to draw but that's only her cover story for she has other reasons. But when she been captured by the Warden, she has been sent to Nanba Prison where everything will never be the same as her previous prisons...