The three policemen honored as "Trident" by the police: Cui Tiejun (played by Chen Jianbin), Xu Guozhu (played by Dong Yong), and Pan Jianghai (played by Hao Ping), encountered a major money laundering case when they retired to the second line. "Trident" faced their opponents 20 years ago again and was challenged by multiple forces. In order to unfreeze the assets, the financial swindlers did not hesitate to hire gangsters to use extreme means. In the face of new crimes, "Trident" used traditional working methods to fight against them, and they all used their own unique skills. When the opponent cleverly used the time to sow discord, the relationship of "Trident" fell apart. But in the face of police duties, they finally worked together to defeat the financial crime group in one fell swoop, and also brought the corrupt hands behind the scenes to justice, continuing the glory of "Trident".