When a vile criminal calling himself the Joker suddenly runs amok in Gotham and turns it into a chaotic town, Batman must tread a fine line between vigilantism and heroism to save it. Backed by mesmerizing performances from Heath Ledger and Christian Bale, this Christopher Nolan movie manages to pose some thought provoking questions like to what lengths should good people go in order to conquer the worst sort of evil? Must they become a little evil themselves along the way?