Set in a gritty and decadent 1970s America, American Boogeyman follows the elusive and charming killer and the manhunt that brought him to justice involving the detective and the FBI rookie who coined the phrase ‘serial killer’.
Lucas Frost, an honest man brought up in a crime family whose only legacy is violence, tries to make his own life with his fiancée, Emma. He is suddenly pulled back into the family business he so despises when his cousin, Eli, perpetrates an armed robbery on a local scrap yard and an innocent life is caught in the crossfire.
When his daughter is murdered, William Duncan takes the law into his own hands, setting out on a quest for retribution. After killing the street thug responsible for her death, he finds himself in the middle of a war with the thug's brother, father, and their gang, who are equally hell-bent on getting even. What ensues is a tense back-and-forth game of vengeance. By the end, William comes to find that the quest for revenge never has a winner.