With the help of Lieutenant Jim Gordon and District Attorney Harvey Dent, Batman raises the stakes on his war on crime and sets out to dismantle the remaining criminal organizations that plague the city streets. The partnership proves to be effective, but they soon find themselves prey to a reign of chaos unleashed by a rising criminal mastermind known to the terrified citizens of Gotham as The Joker. The Joker, whose eerie grin and laughter characterize his emotional and mental instability, becomes a dangerous adversary that Batman seeks to stop at all costs.