Modern anti-drug policeman Zhou Chen died in a mission to arrest drug dealers. He traveled to Shanghai in the 1930s and became a small patrolman.
Shanghai Youth Gang smuggles, and the Kuomintang Fuxing Society Secret Service wants to steal smuggled items from the Youth Gang to strengthen itself. After the death of patrolman Lao Li, young patrolman Zhou Chen takes Lao Li's role. Under pressure from all sides, he works for both the Youth Gang and the Fuxing Society Secret Service.
The warlords and the Youth Gang have established a channel. The Secret Service wants to monopolize this channel, the Japanese Super High School wants to penetrate this channel, and the party's underground organization also wants to use this channel.
To predict the outcome, read this book.