Qin Zihao is the captain of a criminal police detachment in a certain city. One day, Qin Zihao's master Chen Guoan was attacked and killed. Qin Zihao, who was furious, vowed to catch the murderer, but he was involved in a dispute with Liang Zhenkun, a famous entrepreneur in the city. One night, it rained heavily, and a female corpse washed out by rain was found at the construction site developed by Liang Zhengkun's company. Police Director Liu and Political Commissar Zhang decided to set up a special case team to investigate the two cases together, and temporarily transferred Qin Zihao to the special case team to assist in the investigation. Qin Zihao and his colleagues found that the case involved Wang Miaomiao's friend Wu Meili and Liang Zhengkun's lover Song Qian, so Qin Zihao became more suspicious of Liang Zhengkun. While the investigation was in progress, Wu Meili fell to her death. This incident disrupted Qin Zihao's rhythm of investigating the case. Finally, with the help and encouragement of his partner Feng Jiayi, Qin Zihao cheered up and traced the real murderer of the case through clues. It was Liang Zhengkun's assistant Wang Jianbo. After a battle of wits and courage, justice finally defeated evil!