the dark knight is set far away from gotham city
in the film  bruce waynebatman lrb bale rrb  james gordon lrb oldman rrb and harvey dent lrb eckhart rrb form an alliance to dismantle organized crime in gotham city  but are menaced by a criminal mastermind known as the joker lrb ledger rrb who seeks to undermine batman s influence and create chaos