Pendant huit longues annees, l'inspecteur Lorne Simpkins a traque le vicieux criminel connu sous le nom de La Licorne. Mais ce tueur a frustre le MI6 a la moindre occasion, et continue d'entraver la justice. Quand Lorne devient la cible d'un piege qui resulte en la mort de son partenaire, la tragedie ebranle sa confiance en elle. Avant meme d'avoir le temps de recuperer, sa fille adolescente est kidnappee. L'enjeu devient bien plus important que sa reputation professionnelle. Elle se doit de faire justice de La Licorne."

Patrick Conroy, a young American student of medicine in Dublin, decides to take a break from the hustle and bustle of the big city and spend a month in the quietude of the wild and beautiful Glencree valley, County Wicklow. However, surrounded by local legends and myths, he is soon dragged into an ancient mystery that has haunted the village of Ballymoor for centuries. Set on the background of the tumultuous years preceding the War of Independence, and colored by Irish folklore, the Haunter of the Moor is a ghost story written in the style of Victorian Gothic novels.