Ex-marine and master martial artist Isaiah Bone (Michael Jai White), fresh out of prison, arrives on the inner-city streets of Los Angeles, looking to make his fortune in the underground fight scene. Teaming up with fast-talking hustler Pinball (Dante Basco), Bone soon starts making a name for himself as he takes on the toughest opponents around. However, this newfound fame draws Bone into the web of a psychotic crime boss (Eamonn Walker). With the two men tied together by a dark secret lurking in Bone's past, fate leads them towards an ultimate, final showdown.