The Joker is dead, but not forgotten. Gotham City is saved, but it is still not safe. But even after death, the Clown Prince of Crime’s imprint can be seen in more than just the pavement. Remnants from The Joker’s gang are leading wannabes fascinated by his bizarre mystique on a campaign of arson that threatens the city—even as it serves greedy opportunists, including millionaire Max Shreck. And survivors of exposure to The Joker’s chemical weapon Smylex continue to crowd Gotham City’s main hospital. Bruce Wayne is forced into action, prompting a partnership with a charismatic scientist to help solve the health crisis. Nightmares begin to prompt Bruce to ask new questions about the climactic events in the cathedral, and investigations by Commissioner Gordon and reporter Alexander Knox into the arsons only amplify his concerns.