The film tells the story of narcotics police officer Huang Mingjin and the "mysterious figure" Wei Yunzhou. Through completely different means and methods, in the process of calculating and wrestling with each other, they tear apart the facade of urban tranquility, exposing the underground drug network woven by the hidden hand "Long Wang", and ultimately eradicate the darkness with the sword of justice, revealing the dawn of light.

Based on the novel "Remaining Sins". After losing several secret service undercover agents, the Provincial Anti-drug Police Team came to the Taihai Sports Institute to recruit people. Xu Pingqiu, who has rich anti-narcotics experience, took a fancy to Yu's top student scum group. Although they did not study well, they had polarized reviews. But each has its own strengths, knows how to advance and retreat, and has a bottom line. However, it is not easy to fight for Yu Zui and the scumbag who doesn't trust him and has no police dreams.