Slaughter is centered on ex-Vietnam vet and ex-Green Beret captain Slaughter (Jim Brown), who dedicates his life to finding his parents' killers. His parents were murdered by an explosion when a bomb was put in their vehicle. After much investigation, Slaughter discovers that the bomb was planted by the Cleveland Mafia. He tracks the mobsters responsible to an airstrip where he blows up their plane and proceeds to shoot them as they try to escape. Of the three, he shoots two, but one escapes, and we later find he has made his way to Mexico. In return for not being charged in the crime, Slaughter agrees to a bargain where he will travel to Mexico to murder the remaining mobster and send the message that the Mafia is not safe from the United States. Will Slaughter be able to finish off the mobster and avenge the death of his parents?