How does one man change the world? It's a question that haunts Bruce Wayne like the specter of his parents, gunned down before his eyes in the…With the help of Lieutenant Jim Gordon and District Attorney Harvey Dent, Batman sets out to destroy organized crime in Gotham for good. The triumvirate proves to be effective, but they soon find themselves prey to a rising criminal mastermind known as the Joker, who thrusts Gotham into anarchy and forces the Dark Knight ever closer to crossing the fine line between hero and vigilante.