Batman pursues a cop killer known as "Hangman," who pins a children's game to the body of each victim, with the help of an orphaned boy named Robin.

Batman's relationship with Catwoman becomes more intense as an unknown foe, known only as Hush, continues to train the Dark Knight's adversaries, such as the Joker and Harley Quinn, while inflicting torturous mental and physical terror upon Batman, Robin, and Nightwing.