On his 21st birthday, the awesome and terrible powers of the Darkness awaken within Jackie Estacado, a mafia hitman for the Franchetti crime family. With his new powers, Jackie is able to wreak terrifying havoc on his enemies. Jackie must learn to fully command the Darkness so he can take back control of the Franchetti family, which is ruled by his uncle Paulie, a despicable man who is almost universally despised.