In a small town in Yunnan on the China-Myanmar border, a rebellious female student (Gao Ye) accidentally noticed a new stranger (Yang Kun) because her dog was unusually violent. The stranger was actually a professional killer. The female student was almost in danger. Fortunately, her brother (Zhang Mo), who was a drug enforcement police officer, appeared in time to stop the killer. The drug enforcement police arrested the killer and accidentally found a major clue to drug crime, which led to the drug lord (Sun Honglei) and a suspicious case more than ten years ago - the dentist (Ni Dahong) was involved in a fight between drug dealers for no reason, and the young girl was captured by the young drug dealer in the chaos. Now, because of the failure of the internal struggle, the drug dealer brought the missing adult girl (Wang Luodan) back to the small town of Yunnan for the last drug deal in his life. The police, drug dealers, killers, dentists and their daughters were intertwined by fate and started a desperate fight.