Gotham City: dark, dangerous, 'protected' only by a mostly corrupt police department. Despite the best efforts of D.A. Harvey Dent(Billy Dee Williams) and police commissioner Jim Gordon(Pat Hingle), the city becomes increasingly unsafe...until a Dark Knight arises. We all know criminals are a superstitious, cowardly lot...so his disguise must be able to strike terror into their hearts. He becomes a bat(Michael Keaton). Enter Vicky Vale(Kim Basinger), a prize-winning photo journalist who wants to uncover the secret of the mysterious "bat-man". And enter Jack Napier(Jack Nicholson), one-time enforcer for Boss Grissom, horribly disfigured after a firefight in a chemical factory...who, devoid of the last vestiges of sanity, seizes control of Gotham's underworld as the psychotic, unpredictable Clown Prince of Crime...the Joker. Gotham's only hope, it seems, lies in this dark, brooding vigilante. And just how does billionaire playboy Bruce Wayne(Michael Keaton) fit into all of this?