Young undercover narcotics officer Chen Zheng, using the alias Chen Biao, goes undercover in a drug manufacturing group with the approval of his superior, Captain Jiang Hai. Faced with various challenges and crises posed by drug traffickers, including the suspicious drug lord He Yuanhua, the ruthless Liang Qing, and other wicked drug dealers, he steadfastly adheres to his beliefs. In the struggle of blood and fire, Jiang Hai sacrifices his life to protect Chen Zheng. In the end, Chen Zheng successfully kills Liang Qing, captures He Yuanhua, and dismantles the entire drug syndicate....