Yan Jin, a businessman and former anti-narcotics policeman, decides to investigate a drug-trafficking case that caused the death of his close friend. He infiltrates into the organization as an undercover cop, and gets to know Ji Xiao Ou. This causes Zhan Yu, who has a one-sided crush on her, to be jealous. However, Zhan Yu was murdered and Yan Jin becomes primary suspect. 感觉挺可悲的 无论是演员还是营销。瞧不起豆瓣的艺人？！林更新。林狗很帅，没了。富二代骂你唯唯诺诺。没素质和耿直是两回事。我们不可能只做影视爱好者。悬疑部分太难看了。喜羊羊粉丝平怒。本来前面还打两星的，这下还是一星吧。 前缉毒警严谨在卧底贩毒集团调查陈年疑案时，与“似水流年”咖啡店老板季晓鸥相爱。一桩离奇的杀人案却将两人的爱情拖入深渊。真相迷雾重重，而严谨仿佛坠入无尽的黑暗，他和季晓鸥的爱情又将何去何从……
