In his second year of fighting crime, Batman uncovers corruption in Gotham City that connects to his own family while facing a serial killer known as the Riddler.
The year is 2022. It is an era of chaos, half a century after the government announced the coexistence of humans and kaijins. Aoi Izumi, a young human rights activist calling for the elimination of discrimination, meets a man named Kotaro Minami, the one called "Black Sun," who is a candidate for the next Creation King.