The team makes its way to what many believe is the most haunted site in New Zealand, Larnach Castle. With a long history of death, tragedy, scandal and suicide, Larnach Castle is believed to be haunted by all members of the Larnach family, who each occupied a portion of the estate.

The patriarch supposedly keeps watch over the lower floor, while his daughter and wife make their presence known upstairs. The Ghost Hunters International team brave the wrath of the Larnach family and figure out who really is the keeper of the castle.