Dubbed one of the “most haunted places on earth,” Waverly Hills Sanatorium has long been hailed as a “mecca” for paranormal investigators from all around the globe. It is also the site of some of the most striking paranormal encounters from the original “Ghost Hunters.” Now, the new owners have been receiving reports of unsettling new paranormal claims from visitors, which include blood-curdling screams and unexplained sounds. Seeing this as the perfect opportunity to take his new team to one of his favorite haunts, Grant eagerly answers the call for help.