"Following the mind-blowing revelations of "The Joker Year One," Batman must engineer an escape from Zur's prison... but what dark secret does Zur now hold that's a game-changer for the Dark Knight and the entire DC Universe?! And what nefarious role does The Joker play in all this? With Damian's life--and the future of Gotham--hanging in the balance, nothing can prepare the Dark Knight for what's about to happen!"-- Provided by publisher.