The Universal Private Detective Agency is a small detective agency with only three staff members, including the director Huang Ruo-si (played by Xu Guanwen). Due to the business being mediocre and Huang Ruo-si's miserly and harsh personality, the employees He Tun (played by Xu Guanying) and Ji Qi (played by Zhao Yazi) suffer, especially the former. Li Guojie (played by Xu Guanjie), who previously worked at a soda factory, was fired by his boss for being lazy, and with his skills, he came to Universal for a job. Initially, Huang Ruo-si was unwilling to hire him, but upon realizing Li's true abilities, he eventually accepted him, although the salary was naturally harsh.Before Li Guojie's arrival, Huang Ruo-si had partnered with He Tun to handle various cases of infidelity, theft, and fraud. Not every case could be solved, and the process was often filled with awkwardness, far from perfect, but it did reveal the various aspects of Hong Kong society at that time. After his arrival, the collaboration of the three continued in the same vein. What's more problematic is that they are often mistaken for criminals by the police detective (played by Wu Yaohan).Several cases, both big and small, particularly the one involving the eighty-year-old man's young wife (played by Lu Huizhi) having an affair with someone (Wu Yaohan), showcased Li Guojie's stronger work capabilities compared to Huang Ruo-si, earning him more favor from clients. One day, Huang Ruo-si and Li Guojie were commissioned to go to a place previously threatened by robbers, and now there...