Childhood friends Lao Dongdong and Jiang Yi are reunited years later when Dongdong, now in the workforce, encounters Jiang Yi, who has become a successful but aloof CEO. After a drunken curse leads to Jiang Yi’s company going bankrupt, he moves in with Dongdong, pretending to be broke.
Su Ye, posing as CEO Song Yuexi's bodyguard to investigate an injury case, moves next door to her for easier access. As they spend time together, mutual attraction blossoms, leading to an unexpected romance.
The police chief, Detective Ding, and a wealthy local businessman, Feng Da Tou, collaborate with a foreigner and traitor to sell opium for their own selfish interests. A female detective, Huo Qing, arrives in Pujiang Town with her assistant, Yan Er, and has many misunderstandings with the deputy police chief, Xing Yi, as they investigate a case.
Li Zeyu is a Chinese actor known for his roles in short-length drama series and debuted in the short web drama "Pro Detective."