In the peaceful coastal town of Sanping City, the anti-narcotics brigade accidentally seized a batch of new methamphetamine during an operation. Its scale and purity were extremely rare. Sanping Public Security immediately launched an investigation.With her keen sense of smell and insight, Zhao Younan, a retired policewoman from the army, targeted Huang Zongwei, who was engaged in chemical business.The scheming Huang Zongwei ignited the fighting spirit of the fledgling Zhao Younan. She stared at Huang Zongwei. No matter where he was hiding, no matter how high-level the illusion was, she could dig up clues, discover the truth, and rush to arrest him without hesitation.The public security team headed by Zhao Younan and the drug manufacturing and trafficking gang headed by Huang Zongwei, one is relentless in pursuit and the other is cunning and good at hiding. In this way, a cat-and-mouse war is staged.