Gotham City is in chaos and the villains of Arkham Asylum are running amok. Doctor Phosphorus seeks out another scientist to help him grow even more powerful. But when that scientist is Kirk Langstrom, a.k.a. Man-Bat, Doctor Phosphorus—and all of Gotham—will get much more than they bargained for!

From the return of the Black Mask to the destruction of Arkham to general mayhem, Gotham City is crumbling around Nightwing, Robin and the rest of the Bat Family. And when you add a deadly Jason Todd masquerading as a gun-toting Batman to the mix, things have definitely spiraled out of control! The battle for the cowl comes to an end! Who comes out victorious as the new Batman?

With Batman gone, the villains have descended on Gotham! A who's who of Bat-villains star, including Catwoman, the Riddler, Harley Quinn, Two-Face, Poison Ivy, the Penguin and Ra's al Ghul. What kind of havoc will these villains wreak on a city that's already on the verge of implosion?

Michael Lane is an ex-police officer recruited to take part in a secret program to train a replacement for Batman - but was drafted by the Order of Purity to take on the mantle of Azrael, God's sword of justice. Now he carries out an 'eye for an eye' style of justice in Gotham city.

A wave of heroes arrives in Gotham City with hopes of helping stem the tide of chaos threatening to overwhelm...everybody. Starring Huntress, Batgirl, Misfit, Ragman, Manhunter and many others. Will these heroes succeed or will they be victims of Gotham City's madness?