Qin Zihao is the captain of a municipal criminal police detachment. One day, Chen Guo'an, Qin Zihao's master, is attacked and killed. Enraged, Qin Zihao vows to catch the culprit, but unexpectedly becomes embroiled in a dispute with the city’s famous entrepreneur Liang Zhengkun. One night, heavy rain pours down, and a female corpse washed out by rainwater is discovered on the construction site developed by Liang Zhengkun’s company. Chief of Police Liu and Political Commissar Zhang decide to establish a special investigation team to investigate the two cases together, and Qin Zihao is temporarily transferred to this special investigation team to assist in the investigation. Through their investigation, Qin Zihao and his colleagues discover that this case involves Wang Miaomiao's close friend Wu Meili and Liang Zhengkun's lover Song Qian, which makes Qin Zihao even more suspicious of Liang Zhengkun. But amidst the investigation, Wu Meili falls from a building and dies. This disrupts the pace of Qin Zihao's investigation. Eventually, with the help and encouragement of his partner Feng Jiayi, Qin Zihao finally gets himself together, and through the clues, identifies the true culprit as Liang Zhengkun's assistant Wang Jianbo. In a battle of wits and courage, justice ultimately defeats evil!...