The Bass Rock has for centuries watched over the lives that pass under its shadow on the Scottish mainland. And across the centuries the fates of three women are linked: to this place, to each other.In the early 1700s, Sarah, accused of being a witch, flees for her life.In the aftermath of the Second World War, Ruth navigates a new house, a new husband and the strange waters of the local community.Six decades later, the house stands empty. Viv, mourning the death of her father, catalogues Ruth's belongings and discovers her place in the past - and perhaps a way forward.Each woman's choices are circumscribed by the men in their lives. But in sisterhood there is the hope of survival and new life...