The Bat Family returned to the present, but realized that the world had changed drastically - Japan no longer existed, replaced by a huge island suspended in the sky, "The Origin of Japan", which was entrenched in the sky in Gotham City.On the top of the island, there are a group of superpowers named Yakuza. They are cold-blooded and ruthless, and the familiar figure is exactly the same as the Justice League.At this moment, the burden of saving Gotham fell on Batman and his allies again.