In the spring of 1937, a small group of Japanese troops was stationed in Fuwang Town in the Japanese-occupied area of ​​Central China. On the surface, they are controlling the Chinese civilians, but in fact strictly guarding the safety of a secret underground arms depot, warehouse 103, waiting for the arms support response from their larger army. After the Communist Army learned about this, they sent an intelligence agent to sneak into the Japanese army in Fuwang Town to explore the information of Warehouse 103.

A young woman was brutally killed at home. The security guard who admired her set foot on the journey to find the real murderer, but the matter is far more complicated than imagined. With further investigation, Liang Chen discovered that her death was related to the murderer who killed his friend ten years ago.

Deputy captain of the anti-narcotics brigade Tang Lang and the female special police captainYue Xiaofeng are two public security police who are working together on the front line of life and death.