Zhejiang Yushi Ningzhong is upright and upright, and he is deeply loved by the people, but he has offended countless colleagues in the officialdom. Zhejiang officialdom regards Ning Zhong as a thorn in the flesh, and hates to put him to death and then quickly. On this day, Ning Zhong set off from Zhejiang and returned to the capital province to meet his relatives in the capital, but was attacked by assassins on the way and unfortunately died. Ning Zhongze's death alarmed the government, and the Chaozhong Inspectorate rushed to Hangzhou with Tie Feihua to investigate the case and arrest the culprit. Tie Feihua arrived at the scene of the crime in Hangzhou, and inferred from the scene investigation and the sword wound on Ning Zhongze's body that Gu Yuxuan was undoubtedly the murderer. Suffering from the lack of conclusive evidence, Tie Feihua arrested Gu Yuxuan and was released by Lord Chen, who was in charge of the case. Seeing the "murderer" at large, Tie Feihua secretly decided that he must be brought to justice. Gu Yuxuan is a famous assassin in Hangzhou, and he eats this bowl of rice on behalf of others. One day, an elderly man found Gu Yuxuan and was willing to pay 50,000 taels of silver to hire Gu Yuxuan to assassinate Dong Cheng, the owner of Deshun Restaurant in Huzhou. Gu Yuxuan agreed, but he refused because he found out that the elder also had martial arts. Gu Yuxuan's halfway resignation attracted the threat of the elders. For this reason, Gu Yuxuan suspected that the elder was related to Tie Feihua. What happened soon after made Gu Yuxuan change his initial judgment. Just as Gu Yuxuan hesitated, a group of outlaws were already ready to move, ready to put Gu Yuxuan to death. Thinking of the family detained in the hands of the elders, Gu Yuxuan had no way to retreat, so he went to assassinate Dong Cheng. Gu Yuxuan secretly followed, but found that there were many suspicions during the assassination, and he was also attacked by masked people. Gu Yuxuan's situation made Tie Feihua begin to shake the initial inference. At this time, Tie Feihua thought of the "Nangong Yifeng" rumored in the rivers and lakes. "Nangong Yifeng" often bribed martial arts masters to assassinate him with a lot of money, and after getting tired of playing the game of cat and mouse, the assassin would be killed by the martial arts "Nangong Yifeng". Could it be that Dong Chengcheng is "Nangong Yifeng"? With such a question, Tie Feihua quietly watched the changes, and finally let Gu Yuxuan, the real murderer who assassinated Ning Zhongze, recruit from the truth, and Liu Yuliang, the prefect of Suzhou, who hired the murderer, was also punished as he deserved. It turned out that there was no such person as "Nangong Yifeng" on the rivers and lakes. After Ning Zhong was killed, Tie Feihua and his friend Dong Cheng set up this game, the purpose of which was to create pressure on Gu Yuxuan and distract him from one to the other. At this point, the truth of Ningzhong's case was revealed, and Liu Yuliang, the prefect of Suzhou, and Gu Yuxuan, the real murderer of the assassination, abandoned the world according to the law to follow the example.
