A homicidal hunchback known as The Fiend is stalking a theater company in this ultra low-budget whodunit ostensibly based on a short story The Great Mono Miracle by Peter B. Kyne. Looking into the mysterious goings-on, Reporter Frank Gordon (Lloyd Hughes) joins drama editor Jean Monroe (June Collyer) and intrepid, but bumbling, photographer Elmer (Al St. John) in an attempt to flush out the murderer. One of the actors, Reardon (Jack Mulhall), makes himself the prime suspect by behaving highly suspicious, but he, too, is murdered. The Fiend, as Elmer learns the hard way, is someone else entirely, someone who holds a deep-rooted grudge against the company.
~ Hans J. Wollstein, All Movie Guide