瑞佐（郑智薰饰）是个孤儿，从小就被奥祖奴刺客集团收养，并被培训成一个武艺高强的刺客。长期以往的刺客生涯令瑞佐心生厌恶，但是他无法脱离这个组织，直到有一天，他的好朋友被奥祖奴集团残忍杀害，瑞佐下定决心，离开集团，过起了隐藏的生活。他一直在等待合适的时机，替好友报仇。从欧洲过来的探员米卡（纳奥米-哈里斯饰）奉命调查一桩政治案，种种迹象证明该案件和奥祖奴集团有关。为了查明真相，她背着上司偷偷查阅秘密档案，无意间发现背后隐藏的真相，因此遭到奥祖奴的追杀。在一次行动中，瑞佐救下被追杀的米卡，他们结伴而行，此时他们面对的是强大的奥祖奴集团，他们源源不断地派出杀手来对付他们。要想得到永远的安宁，他们必须彻底铲除奥祖奴集团

Rui Zuo (played by Zheng Zhixun) is an orphan, who was adopted by the Ao ZuNu Assassin Group since he was a child, and was trained as a martial arts assassin. Rui Zuo's long career as an assassin disgusted him, but he could not leave the organization. Until one day, his good friend was brutally murdered by the Aozunu Group. Rui Zuo made up his mind to leave the group and live a hidden life. He has been waiting for the right time to avenge his friend. Detective Mi Ka (Naomi Harris), an agent from Europe, was ordered to investigate a political case, and all signs proved that the case was related to the Ao ZuNu Group. In order to find out the truth, she secretly consulted the secret files behind her boss's back, and accidentally discovered the truth hidden behind it, so she was hunted down by Ao Zunu. In one operation, Rui Zuo rescued Mika who was hunted down, and they walked together. At this time, they faced the powerful Aozunu group, and they sent killers to deal with them continuously. In order to obtain eternal peace, they must completely eradicate the Aozunu Group