毛二毛为了当警察，到城里投靠当巡警的刘一手，却卷入到了镇守使姨太太的死亡案件里。于是毛二毛、刘一手开启了一段惊险的破案之旅，不仅破了案还解除了兵灾，几人凯旋而归后，毛二毛也因此变成了一名真正的警察。

The movie revolves around a huge transnational drug trafficking transaction. Lei Zhanjun and Lei Zhansheng are twin brothers. The younger brother was involved in a local gang vendetta. He faked his death and had plastic surgery and escaped unscathed, taking away a huge amount of the gang's funds. The elder brother, who did not know the inside story, crossed national borders and chased the murderer thousands of miles away in order to find out the truth about his younger brother's "death". The younger brother, who had escaped, returned with a new face and identity in order to save his elder brother. Together with his elder brother, he desperately escaped under the double pursuit of the police and the underworld.