(Click CC for subtitles) The Last Narc tells the story of a fallen hero, the men who killed him, and the one man who risked everything to find out what really happened and why. Highly decorated special agent Hector Berellez, who was assigned to lead the DEA's investigation of Camarena's murder, peels back the layers of myth and propaganda to reveal the bone-chilling truth about a conspiracy that stretches from the killing fields of Mexico to the halls of power in Washington, D.C.
The first episode is set in the mid-1970s. The newly formed DEA recruits two Mexican-American street cops: Kiki Camarena and Hector Berrellez. Kiki is assigned to Guadalajara, home turf of the Guadalajara Cartel, while Hector targets cartel operations in Los Angeles. The Cartel is putting cops on its payroll, including three Jalisco state policemen. When Kiki is kidnapped it rocks both sides of the border

(Click CC for subtitles) After Kiki's murder, Hector gets reassigned to Mexico where he ends up leading DEA agents and Mexican soldiers into the longest and deadliest shootout in DEA history. While this puts a million dollar bounty on his head, it also impresses the DEA brass, who then decide to put Hector, one of their most aggressive narcs, in charge of the investigation into Kiki's murder.

(Click CC for subtitles) Hector Berrellez's informants give him ground breaking evidence - first-hand, eyewitness accounts of Kiki's kidnapping, torture, and murder. He learns the incident took place in a cartel hacienda where high-level Mexican government officials were present, along with a mysterious Cuban. They also reveal the cartel and governments attempts to cover up the crime.

Hector Berrellez identifies the mysterious Cuban who interrogated Kiki Camarena: a veteran CIA operative, Felix Rodriguez, a key figure in the Iran-Contra scandal. Although warned not to take his investigation further, Hector refuses and is eventually forced into retirement. The case languishes for years, and then a new source comes forward with a shocking allegation.