A documentary film crew receives a mysterious invite to a replica of the 'Murder Castle' of H.H. Holmes, America's first serial killer. They soon discover that they're being watched, and the... Read allA documentary film crew receives a mysterious invite to a replica of the 'Murder Castle' of H.H. Holmes, America's first serial killer. They soon discover that they're being watched, and there is much more at stake than their viewing figures.A documentary film crew receives a mysterious invite to a replica of the 'Murder Castle' of H.H. Holmes, America's first serial killer. They soon discover that they're being watched, and there is much more at stake than their viewing figures.