ICAC (Independent Commission against Corruption) Lu Zhilian (Koo Tin Lok) and JFIU (Joint Wealth Intelligence Unit) Liu Baoqiang (Zhang Zhilin) respectively investigate corruption and money laundering cases, but there are no clues. At this time, Cheng Deming (Zheng Jiaying), Group L (Internal Disciplinary investigation Unit) of the Independent Commission against Corruption (ICAC), received a report from Eva (Deng Lixin) that Lu Zhiliang had accepted 12 million bribes, and Lu could not explain his immediate suspension. Liu found that Lu was framed and was inextricably linked to the money laundering case that had been investigated. At the same time, he suspected that the bank director, you Zixin (Bai Tiannan), assisted Wang Haihe (Tan Yaowen), the head of the criminal syndicate, to launder money. Hong Liang (Ding Haifeng), the director of the investigation Department of China's Anti-Corruption Bureau, came to Hong Kong and provided important intelligence to Liu Baoqiang. It turned out that the money laundering case involved mainland corruption officials, and land and Hong Kong worked together to combat corruption. Lu also ventured to collect evidence of guilt but was imprisoned, and the situation was endangered.