Unknown Person

When a mutating, highly contagious fungus escapes a sealed facility, two young employees – joined by a grizzled bioterror operative – must survive the wildest night shift ever to save humanity from extinction.

Dr. David Marrow invites three distinct individuals to the eerie and isolated Hill House to be subjects for a sleep disorder study. The unfortunate guests discover that Marrow is far more interested in the sinister mansion itself — and they soon see the true nature of its horror.