Aveline is determined to discover the truth behind her Uncle Rowan's mysterious disappearance when she travels to his home with Mum and Aunt Lilian. After years of hoping he would return, they have finally decided to sell his house - but Aveline and Harold have other plans. Sneaking into Rowan's study, Aveline discovers he had been researching possible supernatural activity around an ancient burial mound - and linked this with the unexplained disappearances of other local villagers. Dark, magical forces are at work, and they'll do anything to remain hidden, as Aveline and Harold soon learn . . .