Set after Justice League: Unlimited, The Batman remains wary of both remaining invaders, and members of the Secret Society who he was generous enough to provide with a head start for their retreat. It took a lot of convincing from the other founding members for him not to investigate alone. Frankly, he only agreed to avoid giving the villains more time to recover. His assistance came in the form of Doctor Light. However, despite not working with him often, Light, for a while now, had become increasing worried with The Batman's state since the situation with Ace. With both being antisocial, just how compatible will Doctor Light and The Dark Knight be?