Final chapter. Arkham Asylum is in ruins, destroyed by the Joker's posthumous act of terror. The media and the Gotham police pour in, searching for Batman, only to find shreds of his uniform amidst the rubble. Has the Joker accomplished in death what he could not achieve in life?

This special, epic story follows events from the conclusion of the Arkham City video game and leads into the much-anticipated Harley Quinn DLC (downloadable content). Batman's greatest foe is dead, but why is the Dark Knight so troubled? Past and present conflicts are explored in this six-chapter weekly series.

When Batman arrives at Arkham Asylum to follow up on a clue, it forces him to remember an early encounter with the Joker, one that tied in to a terrifying attack on the citizens of Gotham. What connection does this past episode have to the arch criminal's current plot from beyond the grave?

Batman is deep inside the ruined Arkham Asylum, searching for a clue to disarm Joker's final, deadly plot. He finds himself in a cell steeped in the history of the war between these two men--the very cell used to hold Joker all those years ago. Could this cell also be the final resting place of Batman?!

Immediately after the death of Joker, the news rips through both Arkham City and Gotham. Arkham City erupts in violence, headed up by the grief-crazed Harley Quinn. The police try to take control of the situation, while Batman finds a post-mortem message from the Joker himself!

Batman learns the full extent of Joker's horrific plans for revenge. Even from beyond the grave, Joker's diabolical plotting causes a full-scale riot--both in Gotham and in Arkham City. A final clue sends Batman rushing to Arkham Asylum to try and save the city, but will he get there in time?