Every culture has one – the horrible monster fueling young children's nightmares. But for Tim, the Boogeyman still lives in his memories as a creature that devoured his father 16 years ago. Is the Boogeyman real, or did Tim make it up to explain why his father abandoned his family?

The majority of the story occurs in the office of Dr. Harper, a psychiatrist, where a man named Lester Billings talks to the doctor about the "murders" of his three young children.

Based upon a short story by Stephen King, the Boogeyman is a film about Lester Billings as he struggles to hold on to his sanity as he copes with the mysterious death of his three children. For Stephen King or Darabont fans, this is an official 'Dollar Baby.'

When children start disappearing, a rebellious teen under house arrest starts to suspect that a legendary evil, a boogeyman known as the Cucuy, might be responsible.

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’.