In the 1960s and 1970s in Hong Kong, the police and gangs colluded, corruption was rampant, and social resentment was extremely heavy. At this time, Xu Le (played by Wang Haoxin), who was kind and straightforward by nature, dropped out of school to join the police due to his poor family background. He put on a police uniform and became the most ordinary police officer. He was ostracized and demoted because he solved a robbery case and offended the uncle and nephew of Inspector Long (played by Li Zixiong), and was transferred to the Xiashui Police Station. When dealing with accidents and disputes, he helped and met the rich girl Bai Zhenni (played by Xu Dongdong), who fell in love with Xu Le at first sight. On one side is his girlfriend Azhen (played by Yun Qianqian) who has always been with him, and on the other side is the rich girl who can get him out of trouble. He is faced with the choice between power and love. How did Xu Le turn the tide, rise step by step, and become a legendary detective...