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Qin Zihao is the captain of a certain city's criminal police detachment. One day, Qin Zihao's master Chen Guoan was attacked and killed. Qin Zihao, furious, vowed to catch the murderer, but unexpectedly 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 the rain was found at a construction site developed by Liang Zhengkun's company. Police Bureau Liu and Political Commissar Zhang decided to set up a task force to merge the two cases for investigation, and asked Qin Zihao to be temporarily transferred to the task force to assist in the investigation. Qin Zihao and his colleagues discovered after investigation 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 ongoing, 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 found out through clues that the real culprit in the case was Liang Zhengkun's assistant Wang Jianbo. After a battle of wits and courage, justice finally defeated evil!