Batman, Gordan and Harvey Dent team up to bring down criminals in Gotham. A twisted new criminal named the Joker (Heath Ledger) might be more than they can handle though.
The Dark Knight is..dark and violent and not really action packed. It's more like a well made crime drama. It's always entertaining though due to the excellent performances. It's sad that we'll never see Ledger in the role again because he was amazing and no villain in a 3rd film could possibly out do his Joker. Johny Depp could possibly try to do what Ledger did if he played the Joker. But it would be disrespectful if they recast the role so soon.