Synopsis：Young narcotics officer Chen Zheng (He Shengming) receives approval from his superiors to go undercover with a new identity inside a drug production facility. Working in coordination with Jiang Hai (Wang Yiquan) outside the plant, he devises a plan to uproot the massive drug manufacturing and trafficking ring led by He Yuanhua (Yu En'tai). Along the way, Chen repeatedly faces probing and threats from the cunning and treacherous drug lord. To gain the traffickers' trust and precisely locate the drug lab, Chen must force himself to act like a hardened gangster accustomed to the underworld, while also evading constant surveillance and searches to relay intelligence. The battle between Chen Zheng and his fellow narcotics officers and the drug trafficking organization has begun.