After the death of her father, Catriona goes to stay with long-lost relations in Drumwithie Castle. Handsome and witty 21-year-old Jamie calls Catriona Cat, for the faerie cat associated with the Other World who roams the Scottish hills. He believes that Cat was meant to come here so that all the castle's secrets would be revealed: the truth about his mother's incarceration and his father's and grandmother's reluctance to talk about the past - but most of all, what it is the ghost girl who visits the tower wants to tell them.