In 1991, Ni Kun, the leader of the Hong Kong gang, was killed. Except for Han Chen (Zeng Zhiwei), the five leaders of the Ni family, all waited for an opportunity to betray and make trouble. Unexpectedly, they were restrained by the insignificant second generation of the Ni family, Ni Yongxiao (Wu Zhenyu), without a single effort. This attracted the vigilance of Huang Zhicheng (Huang Qiusheng), the ancestor of the major crime case, and he sent police academy student Chen Yongren (Yu Wenle) to infiltrate the Ni family for long-term undercover work. In order to consolidate his power, Informant Liu Jianming (Edison Chen) was planted within the police as early as possible. Three years later, Ni Yongxiao, whose career was booming, decided to rest assured...