As Professor Monaghan continues his research into the house, he finds that there may have been other beliefs at work there and suggests to the O'Rourke's that they leave the house. When they find Rebecca Muir's diary, Monaghan starts to fill the gaps in the history of the house and the Dunbars. What he learns however is that the O'Rourke's may not have acquired the house by chance and that the spirits there have designs on the O'Rourke's themselves. (thetvdb.com)