When bestselling author Carrie McClelland visits the windswept ruins of Slains Castle, she is enchanted by the stark and beautiful Scottish landscape The area is strangely familiar to her but she puts aside her faint sense of unease to begin her new novel, using the castle as her setting, and one of her own ancestors, Sophia, as her heroine Then Carrie realises her writing is taking on a life of its own and the lines between fact and fiction become increasingly blurred