In the Winter of 2117, an out-of-control vehicle careens into a building. The driver is Izumi Yasaka, a psychological counselor at the isolation facility for latent criminals in Aomori prefecture known as "Sanctuary." Yasaka's immediate repatriation is decided just before her interrogation, giving rise to suspicion. Inspector Shimosuki, along with Enforcers Ginoza and Kunizuka, is sent by Akane Tsunemori to learn more about the situation. What they find is a "false paradise" as they endeavor to learn the true nature of the facility, its occupants and the therapists who work there.