With Batman a prisoner -- and the League of Assassins now in control of Gotham -- it's up to a small band of heroes to save the city. Still wary of Alfred, Katana goes with him to meet Gordon. Together, they plan to hack into the Ion Cortex, defeating the League's plans and pulling Gotham out of darkness. Unfortunately, the best person for the hacking job is Gordon's own daughter, Barbara. Meanwhile, Batman finds himself in the same cell as his old nemesis Silver Monkey. Agreeing to an uneasy truce, the Monkey and the Bat break out, with Batman determined to destroy the Cortex.