Yusia is a college student aiming to become a police officer. She accidentally ends up at a murder scene and is mistaken for the killer, ending up in prison. In her despair, she meets a group of unique inmates. With their help, she starts looking for a way to escape. However, during her investigation, she notices something strange happening inside the prison.

"This prison... something's not right..."

Yusia and the others get caught up in this strange occurrence. Will they be able to work together and successfully break out of prison?

[Translated from the official site]