Gordon and Batman are hot on the Riddler's trail. Believing Amanda Waller and her Agency to have too much of an unchecked moral high ground, the duo decides to go it alone, without backup, to check out the Riddler's hideout in the East End, an area that Harvey Dent destroyed as mayor to stop the Children of Arkham a year prior. What's found there will set events in motion that neither men can hope to avoid, and that might be enough to end their partnership before it can stop this madman.