The story takes place somewhere in Southeast Asia. Having witnessed his father, who was an undercover, being murdered by drug traffickers as a child, the male protagonist Song En is determined to join the police force and avenge his father. However, he gets injured during a training session at the police academy and suffers from complications. Upon his superiors’ suggestion that he quit, the reluctant Song En steals the police's guns and ammunition on a dark and stormy night and flees in fear of incrimination, and there has been no news of him ever since. Many years later, when Song En re-appears in front of his police academy classmates Cha Nong and Susie, he has transformed into the confidant and right-hand man of Southeast Asia's major drug lord. It turns out Song En’s escape many years ago is a scheme carefully designed by the superiors to let Song En break into the drug cartel. In the fight against the drug cartel, Song En cooperates with the others while working on the inside. They successfully wipe out the drug cartel and kill their leader, Song En’s father’s murderer, such that his father can rest in peace....