Five years after the death of his wife, MacAoidh Armstrong moves into a smallholding in southern Scotland with the intention of living a self-sufficient existence. In the nearby town solicitor Libby Butler is trying to find peace after her recent deadly brush with the unknown. On a hill by the steading stands The Ghost Tree: all that remains of the former Ringcroft of Stocking. Local legend says that when the last Ghost Tree dies, the Rerrick Parish Poltergeist will return. Just days after MacAoidh moves in, he is forced to contend with a number of strange events that distance him from the local community. Turning to Libby for help, they find themselves challenged by a series of bizarre and terrifying occurrences which defy all logical and scientific explanation. As the phenomena become increasingly violent and lives are threatened, Libby must delve into closely guarded secrets to discover the reason for the present terror ... and come to terms with her growing feelings for MacAoidh. Can she save the pragmatic Highlander from an ancient evil, and in doing so will she lose her heart?