Hirokin, a reluctant hero marked by a dark past, must fulfill his destiny when forced to choose between avenging the murder of his family or fighting for the freedom of a people long abused.

搏击高手波恩（迈克尔?加?怀特 Michael Jai White 饰）新近由狱中释放，他在洛杉矶一条炎热、有些混乱的街区租下了一个房间。每天夜色降临的时候，城市中无数地下拳场也开始活跃了起来，波恩很快物色了一位黑拳经纪人平宝，与其合作后击败了无数对手，而这一系列战斗的目的，是为了获得挑战詹姆斯团伙的资格。詹姆斯手中拥有最强大的黑拳战士，…