慈祥的老妇人伊芙琳在一次超市劫案中不幸罹难，她的四个养子：鲍比（马克•沃尔伯格 Mark Wahlberg 饰）、安格（泰瑞斯•吉布森 Tyrese Gibson 饰）、杰克（加内特•赫德兰 Garrett Hedlund 饰）以及耶利米（安德雷•本杰明 André Benjamin）纷纷回到小镇，为母亲料理后事。原来，伊芙琳在年轻时热衷慈善，她将当年那四个性格顽劣的孤儿留在自己家中，用悉心的爱和教导抚育他们长大。四个肤色不同的兄弟决定避过警方，自己抓到劫犯为母亲报仇，然而虽然他们枪决了当天行凶的杀手，却发现母亲的遇害另有隐情，耶利米因为财务问题似乎卷入了与当地黑社会的纠纷……究竟是谁杀害了母亲，四兄弟要拼出一个真相……Four adopted brothers come to avenge their mother's death in what appears to be a random killing in a grocery store robbery. However, the boys' investigation of the death reveals more nefarious activities involving the one brother's business dealings with a notorious local hoodlum. Two cops who are trying to solve the case may also not be what they seem.