Nick Hume is a mild-mannered executive with a perfect life, until he witnesses the brutal muder of his oldest son in a gang initiation rite. Transformed by grief into a vigilante, Hume is determined to set the balance sheets right by exacting swift revenge. But the scales of justice are fickle and the bloody weight of retribution swings it madly from side to side as Hume discovers that vengeance carries the highest price.