With the Joker, Two-Face, and Penguin's gangs at war and Batman busy in Metropolis, Harley Quinn, Catwoman, and Poison Ivy become targets when they each anger one of Gotham's three biggest gangsters. Catwoman stole a diamond from the Penguin, Poison Ivy destroyed Two-Face's drug factories in her fight to save the environment, and Harley Quinn broke up with the Joker and blew up Ace Chemicals, the Joker's main base. So, the three criminals hire Deathstroke to kill them.
