Darkseid sees great opportunity to take over Star City, the first city in space built by Japanese billionaire Industrialist Dr. Moko. When Batman, Samaraui, and Firestorm journey up to the city, they and Moko's daughter are unaware that Moko has been captured and replaced by a robot duplicate. Meanwhile, Superman and Wonder Woman join Aquaman who has found an odd island which is not only Darkseid's base of operations, but a trap set for them. Batman, Samaraui, Firestorm, and Moko's daughter are forced to flee through Star City with the robot workers being contolled by Kalibak and Desaad. Their only chance is to cut off the power and black out the city.