The story begins fifteen years ago when drug lord Zhonghu sent people to hunt down drug dealer Aunt Mei. Young Lin Lang and Lin Feng witnessed their mother Aunt Mei being killed. In order to avoid the killer's pursuit, the elder brother Lin Lang sacrificed himself to lure the killer away and disappeared without a trace. Since then, the two brothers have embarked on different life trajectories, one as a drug enforcement police officer and the other as a drug lord...