Zak and the crew go far off the beaten path in Arizona to investigate an abandoned sanatorium. Dozens of deaths, including the murder of a child, have left a heavy residue of pain and suffering on the building, making it a hotbed for aggressive poltergeist activity.

Sixty years after a gruesome murder-suicide in a Los Angeles mansion became a tabloid tale and urban lore, Zak and the crew gain entry. In the first-ever paranormal investigation of the long-shuttered residence, they uncover shocking secrets and a terrifying presence.