Police officer Lin Kai is assigned to go undercover to infiltrate a drug cartel named "Twin Eagles." In order to gain the trust of Eagle, the leader of the cartel that he is trying to locate and shut down, Lin Kai slowly unwillingly becomes a drug addict himself. Things get even more complicated when Lin Kai realizes that Eagle has been plotting a violent revenge against his supervisor Li Jian Guo for over a decade. Lin Kai begins to lose control of himself as the addiction grows by the day. The cast includes Huang Xuan, Duan Yihong, Lang Yueting, Zu Feng, Xing Jia-Dong, and David Wang.