Argumento
Collects Detective Comics (1937-2011) #867-870.
Cover by Peter Nguyen.
A variation of The Joker drug is causing users to suffer violent mental breakdowns. Now, the citizens of Gotham City are divided into two gangs: one led by a Batman impostor who pledges to bring law back to the streets, the other led by a Joker look-alike out to punish the innocent.