The play tells the story of Lv Yunpeng, a highly intelligent and educated chemical engineer, who, triggered by family ties, goes to the southwestern border alone. Under the escort of anti-drug police officers, he lurks in the dark and dangerous drug trafficking network, battles wits and courage with all kinds of drug dealers, tracks down the mastermind behind the scenes, and goes straight to the core of the Golden Triangle drug trafficking group Truman. After escaping death many times, he finally cooperates with the police to uproot Truman and becomes a meritorious undercover agent.