Nazri, an officer from the Narcotics Department, faces traumatic problems after losing his lover during an undercover mission. The drug syndicate led by Tony Ifrit often evades the law during the judicial process. Nazri decides to resolve the issue secretly himself and earns the media nickname "Meth Killer." When the "Meth Killer" case gains public attention, Syeriff, an officer from the Integrity Department is assigned to solve it as it is suspected that the Meth Killer might be hiding among the ranks of the Narcotics Department itself. Sheriff begins his investigation and becomes intrigued as he senses the potential of every member to be the Meth Killer. The situation becomes tense when Nazri and Sheriff find themselves working in the same department. There is a traitor with the police force working under the Meth Killer, as Sheriff gradually uncovers the secrets one by one.