McCallum stars as a narcotics agent traveling south of the border in this neatly crafted thriller. His only clue to the whereabouts of a former mafia kingpin is Stevens, the mobster's one-time girl friend. When McCallum goes undercover as a pusher, he learns that the man he is looking for has been murdered. A barrage of action and gunplay follows when McCallum enlists the aid of the local police force, chasing a gang of smugglers through a Mexican forest and eventually killing all the villains. Savalas and Montalban both perform in an admirably campy fashion.