原美国特种兵杰克•坎贝尔因殴打残酷暴虐的上司而被逐出兵营,落寞的他回到家乡,却发现弟弟乔伊被人打成重伤,昏迷不醒。乔伊的妻子莎拉怀有身孕,为了让妻儿生活幸福,他拼命打工赚钱,结果因赌博欠下巨额赌债,为此不得不在黑市拳组织者波普的安排下参加黑市拳比赛,导致身受重伤。杰克发誓为弟弟报仇,四处寻找凶...
Facing a bleak future, a young man runs away to Mexico where he is recruited by the mysterious captain of a paramilitary group of teens who fight drug cartels. Isolated at their desert camp and unsure what he's fighting for, he seeks to prove himself in this crucible of manhood.