Yukio Harada. Husband, father, martial arts expert, former gangster. In one night his idyllic life is torn away from him when his old boss, Jafari, takes his wife and murders his young son as payment for a debt. Yukio is left alive and in shame. A year later Jafari finds his criminal empire being torn down piece by piece by an unknown group and his reputation amongst the city's elite villains in the gutter as a result. After the discovery of a horrific clue, Jafari comes to the conclusion that his downfall is the work of only one man; Yukio Harada, returned for revenge after all this time. This of course means war, as Jafari immediately sends his men out to track down Yukio. But little does he know that Yukio hasn't returned alone. He has procured himself a most powerful weapon. A martial art straight from the bowels of Hell itself.