With a baby on the way, Archie is running out of time to find answers. As he digs into his family history, he is shocked to find stories of the Power tracing back through the generations, from the famous Scottish witch trials to the time of the Viking raids. When the day finally arrives for their daughter's birth, Archie and Zaira anxiously look for any signs that she feels the Power. The genealogical trail for answers leads Archie to the barren and desolate landscapes of the Outer Hebrides of Scotland and the fjords of Iceland, bringing clarity to the story of his family and its connection to the Power. But with that clarity comes terror for their daughter's future and desperate preparation for the inevitable battle that has been waiting for centuries to be waged.