After his battle with the infected Doomsday, Superman's body was somehow transported to the Phantom Zone. Supergirl calls upon Zen Ryukokuo to help her infiltrate the area and find out where Superman is located. To their shock, Superman is strung up on display and still alive in a coma-like state. The one responsible, The Phantom King known as Xa-Du. Now Supergirl and Zen will have to fight their way through him in order to save Superman and bring him home.