In the late 1940s, the Shanhai Gang rises as a key force in the local Chinese community. Retired leader Cheng Hui returns to rebuild the gang amid external threats, internal power struggles, and colonial interference, shaping its fight for survival and legacy.

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.

The soldier king Qin Yang's fiancée Ye Qin met with an unknown beast and died tragically. Gu Ping invites him to participate in Ye Qin's scientific research before her death. But Gu Ping is using Ye Qin's research results to combine the genes of unknown beasts to create the "Zero" dragon creature. The intelligent dragon creature, coupled with the extra-terrestrial beast evolved by devouring, an imminent city war is coming...