Most of the world is trapped in the Nightmare Realm. One of the few still awake is Zatanna, who must defend her unconscious allies Wonder Woman and Detective Chimp from Insomnia’s Sleepless Knights—led by their horrifying Sleepless Queen! But the outnumbered Zatanna can’t do it alone. She uses her magic to summon any champion that is still awake, which puts her in an unlikely team-up with one of the world’s strangest superheroes: the Unstoppable Doom Patrol’s Robotman!