Gotham City had been quarantined. Robin delivered the blood to Batman, who began working with it in attempt to create an antidote. Azrael soon arrived with a second blood sample. Nightwing offered his services in the battle. Batman got Poison Ivy out of Arkham so that she could deliver the antidote to the residents of Babylon Towers. Nightwing and Robin attempted to stop rioters outside the strong hold; Huntress joined them as Ivy entered. The police went to James Gordon for leadership.