The wife of Superintendent Wong Man-pin (Lam Ka-tung) of the Commercial Crime Investigation Division went to the Independent Commission Against Corruption to report that her husband's huge amount of cash was of unknown origin. Chief Investigator Luk Chi-lin (Louis Koo) was ordered to summon Wong to the Independent Commission Against Corruption for questioning. However, his opponent was cunning and well-versed in all the tricks of the black box, and finally escaped safely. Not long ago, Wong had investigated Luo Deyong (Lo Hoi-peng), who was known as the godfather of the Hong Kong accounting industry, but failed. The abnormal behavior of the two in the video aroused Lu's suspicion. At the same time, the Z Fund, whose identity is difficult to identify, is about to be listed under the promotion of the sanctimonious lawyer Wu Zhiyong (Wang Min-tak). The fund is under the banner of poverty alleviation and is expected to attract the Hong Kong government's 15 billion special care fund to invest in it. Lu Min-sen noticed the strangeness in it, and he and his colleagues used the limited time to conduct a comprehensive investigation. Under the huge temptation of money, greedy people took risks and did not hesitate to kill and bloodthirsty for this. The Z storm that swept the filth is coming, and the dark clouds are pressing down on the city and the city is about to be destroyed...