In Yunlai City, a city on the border of the country, undercover Lin Kai (Huang Xuan) was raided by drug police while trading with his boss Cheng Yi (Wang Yanhui). In a critical moment, Lin Kai rescued the other drug dealer, and was then taken hostage all the way to the Golden Triangle, where he came to the lair of the cunning and vicious drug lord Eagle (Duan Yihong). Eagle was furious and sent his son and Lin Kai back to Yunlai City to find out who had swallowed his money and goods. After several fights, Lin Kai took the initiative and asked Eagle to hand over the drug management rights in Greater China to himself, in fact, to get closer to Eagle and catch this group of criminals in one fell swoop. From the day he walked out of the police academy, he gave his life to the country and the people, so he had to abandon his original identity and travel through this sinful world as a drug dealer. There is no way back, and the defenders of the law can only move forward courageously...