The artificial islands floating in Tokyo Bay, the "Far East Special Area Outside the Law" are collectively referred to as the "24 Districts". Although they have different backgrounds, hobbies and personalities, Shuta Aoi, Ran Akashiro and Koki Suido, who grew up there, have been good friends since childhood. But their relationship changed dramatically due to a certain event. During the memorial service for the first anniversary of the incident, the phones of the three people who met again by chance suddenly rang at the same time. It was a call from a dead companion, forcing them to make a "choice for the future". The three of them protected their beloved 24 Districts and the future of people in the way they believed in.