One warm rainy summer, Freya Dane, a PhD candidate in archaeology, arrives on the ancient Scottish island of Findnar. Estranged as a child from her recently dead father, himself an archaeologist, Freya yearns to understand more about the man, his work on the island, and why he left her mother so many years ago. It seems Michael Dane uncovered much of Findnar's Viking and Christian past through his search for an elusive tomb, and Freya continues with his work. The discoveries she is destined to make, far greater than her father's, will teach her the true meaning of love and of loss.

AD 800, and a wandering comet, an omen of evil, shines down on Findnar. The fears of the locals are justified. In a Viking raid, Signy, a Pictish girl, loses her entire family. Taken in by survivors of the island's Christian community, she falls in love with an injured Viking youth left behind by the raiders and is cast out. Confused and bereft, eventually she becomes a nun, a decision that will unleash tragedy as she is plunged into the heart of a war between three religions. Forced to choose between her ancestors' Animist beliefs, her adopted faith, and the man she loves, Signy will call out to Freya across the centuries. Ancient wrongs must be laid to rest in the present and the mystery at the heart of Findnar's violent past exposed.