Featuring commentary from surviving participants, as well as other filmmakers and critics, this documentary chronicles the career of director John Boorman and the tumultuous production of his film Exorcist II: The Heretic, exploring its critical and commercial failure, how it changed the industry, and the importance of risk-taking in art.

A gay porn star's mysterious disappearance becomes an obsession for both a writer and another adult film star, leading them into dark supernatural corners that were never meant to be explored.