1976年,乔(尹成植 饰)的父母因为卷入洛杉矶的贩毒生意而遭到杀害,当时尚为幼儿的乔幸运的被杀手麦克斯(凯斯·大卫 Keith David 饰)救走,并在后者的严苛训练下成长,十一年前,和乔一起长大亲如兄弟的迈尔斯(Bokeem Woodbine 饰)不辞而别,而之后的乔成为了一名杀手。乔接受了一单以女歌星安琪儿为目标的新任务,但他惊异的发现,安琪儿的保镖居然是多年来杳无音信的迈尔斯。乔只得推掉任务并找到麦克斯一探究竟,始获知养父多年来的心结……在乔拒绝任务后,一对疯狂的杀手夫妻受命刺杀安琪儿,为了保护兄弟般的迈尔斯,乔决定与杀手战斗……
After a meltdown, a demoted detective is given the opportunity to go undercover and take down the mob's most ruthless killer, but his life and only chance at redemption spiral out of control as he loses himself in the role.