Neither Garland nor Gary Hansen ever believed in ghosts. During Labor Day weekend of 2001, the 14-year-old brothers venture to an abandoned hospital in their hometown where they become believers. After their mother does not believe their ghostly story, the brothers become determined to prove that supernatural occurrences happen. During their college years, they meet another amateur paranormal enthusiast and form Ghost Mill Investigations. In 2011, the now- professional ghost hunters get a call to investigate one of the worst institutions on the East Coast. Along with their fellow investigator, the brothers meet with former residents of the hospital and learn only some of what made the hospital so horrific. It is only during their investigation that they discover much more than they ever would have thought possible with an entity stronger than anything any of them had ever experienced. The evidence they gather during their investigation leaves no doubt that Shenandoah Lodge State Hospital is truly haunted.