A bizarre murder occurred in Wan Chai Financial Center. The famous entrepreneur Liang Zhihua was found dead in his office. The cause of death was poisoning. However, there were no signs of intrusion in the entire sealed office, and surveillance video showed the deceased working alone late into the night.
Senior Inspector Chen Yongle of the Crime Unit took over the case. Through preliminary investigation, he found that the deceased had conflicts with many parties during his lifetime: his company was preparing to go public, but was exposed to financial fraud; his relationship with his mistress was discovered by his wife, and he was in trouble; at the same time, he also had unclear relationships with underworld figures.
As the investigation deepens, more cases surface. A lawyer who had business dealings with Liang Zhihua was found to have committed suicide at home, and a securities analyst disappeared mysteriously. These seemingly independent cases all vaguely point to the biotechnology company.
During the investigation, Chen Yongle discovered that his boss, Deputy Commissioner of Police Huang Zhiwei, seemed to be secretly obstructing the investigation. At the same time, a mysterious informant "Ghost" continues to provide them with key information. Chen Yongle must not only battle wits and courage with the mastermind behind the scenes, but also be wary of possible criminal policemen inside.
During a key operation, He Yufeng was unfortunately infected by a nanorobot and her life was in danger. Chen Yongle must make a choice between solving the case and saving his partner. In the end, with the help of "Ghost", Chen Yongle exposed the entire conspiracy and successfully stopped the criminal group's plan.
However, when everything settled, Chen Yongle was shocked to discover the true identity of the "ghost". It turns out that this seemingly simple murder actually involved a shocking secret related to the fate of Hong Kong.