The story tells about Yan Peng, an elite drug enforcement officer, who was chasing the drug dealer Chi Na when his colleague and good brother Agula died at the hands of the drug dealer. Yan Peng was very sad and came to Agula's home to take care of his family. Unexpectedly, he ran into the real Chi Na who came to Agula's home and was ready to let Agula's father lead the way out of the border. After Yan Peng was extremely puzzled, he learned that the drug dealer he had defeated before was Chi Na's twin brother. Yan Peng was quick-witted and fought with Chi Na without exposing himself. With Yan Peng's unremitting efforts, he finally brought Chi Na to justice.