A vicious gang war for drug dominance draws in a disturbed Special Forces veteran John Bradley. Trying to adjust to normal life and haunted by inner demons of a violent past, the underworlds retribution on his last connection to humanity, a daughter and grandchild leads to a descent of fury and violence that not even the brutality of gangland is prepared for.《老炮》里的主角，是一个冲动式的人物，性情中人，举止招摇，而现实中的冯小刚被誉为小钢炮，是因为他也是这样的一个人物，由他来演，正合适不过。