In 1917, Liujia Village in the southwest of China. Liu Jinxi (played by Donnie Yen) and his wife Ayu (played by Tang Wei) raised their two sons Fangzheng and Xiaotian together, and their lives were plain and happy. Until one day, two uninvited guests broke the peace of Liujia Village and destroyed the lives of Jinxi's family. The two men tried to rob the village's money box, but were caught by Jinxi who happened to be there. After a chaotic fight, the two bandits were beaten to death by Jinxi. Since one of them was a wanted criminal by the government, the county magistrate was overjoyed, and the villagers also regarded Jinxi as a great hero. However, this seemingly ordinary blind killing aroused the suspicion of a person named Xu Baijiu (played by Takeshi Kaneshiro), who was a constable of the county government. From the clues, it can be seen that the two bandits died at the hands of a martial arts master. Xu Baijiu stayed in the village and started a series of observations, investigations and tests on Jinxi. In this process, Jin Xi's mysterious true identity gradually surfaced, and Liujiacun was also facing an unprecedented crisis...