A lethal assassin for a secret Chinese organisation, who sheds tears of regret each time he kills, is seen swiftly and mercilessly executing three Yakuza gangsters by a beautiful artist. She is captivated by the grace of his kill and later falls in love with him. An intense power struggle for the leadership of the Yakuza Clans ensues as they seek vengeance for the death of their leader.

故事讲述了当代旧金山唐人街的年轻厨师金凯（伊科·乌艾斯饰）卷入三合会对致命的古老中国神秘力量“五行”的追逐。阿凯无意间拥有了神秘力量，被迫成为了五行刺客，他必须利用自己高超的武功，从五个想要毁灭世界的现代罪犯手中夺回超能力。

CBS台到目前为止续订了十八部剧集，其中包括《夏威夷特警 Hawaii Five-O》

故事紧接上一季结尾：夏威夷州长遭谋杀后，Steve McGarrett成了头号嫌疑人，被临时羁押在监狱里等候出庭受审。Danny突然带着能够洗清他罪名的证据前来探监。与此同时，Kono遭到停职检查的处分，内务调查部派人对她展开全面调查。Terry O'Quinn在本集中扮演McGarrett在海豹突击队受训时的指挥官Joe White；Richard T. Jones扮演新任夏威夷州长Sam Denning；William Sadler再次扮演McGarrett的父亲John McGarrett。

正在休假的警察Darren（郭富城）与好友兼搭档Alex（王力宏）一起出席后者女友的时装发布会时，目睹一桩谋杀案，两人立刻停止休假投入到了破案中。调查时，两人发现案件异常复杂，牵涉到大陆南方某城的一个庞大的犯罪组织，赶赴到该城后，两人结识为调查一宗涉及国际犯罪组织的案件而深入虎穴当卧底的国际刑警Norika（藤原纪香）。
为引出大鱼，Norika铤而走险假扮模特儿走秀，Darren与Alex则在暗中观察，当等来目标人物与之发生枪战时，Alex不幸中弹身亡。伤心至极的Darren发誓要将黑帮铲除，他和Norika也渐渐生出感情。

Super-assassin John Wick returns with a $14 million price tag on his head and an army of bounty-hunting killers on his trail. After killing a member of the shadowy international assassin’s guild, the High Table, John Wick is excommunicado, but the world’s most ruthless hit men and women await his every turn.