The moment she starts her doctorate in Oxford, Sarah is beset with mysteries. An old portrait in her rented house bears an uncanny resemblance to her. A new lover insists he's a ghost. Her attractive, sinister supervisor obstructs her research at every turn. An ordinary hill on the meadow fills her with fear - and not just her, but also the man with who she falls in love. And every time she has sex, she hallucinates strange places and other times. With her own life and soul at risk, Sarah uses sex-magic and a sequence of visions to travel between different times, worlds and places. On an epic journey, she battles an ancient evil to solve a mystery dating back centuries. A mystery that holds the truth of her origins and purpose.