Scotland, 1660. On the wild coast near Aberdeen, healer Ailsa lives a quiet, simple life. A small cottage. One loyal friend. Her work. But beneath the calm surface, she is drowning in loneliness, longing for something she has never dared to reach for. On the darkest night of her life, everything changes. Ailsa encounters a mysterious and terrifying entity, a being who promises her the one thing her heart desires most. As her wish slowly begins to take shape, Ailsa discovers the truth: Nothing comes without a price. Nothing is what it seems. And love — true, eternal love — may demand more than she can bear to give. Everyone seeks a love that lasts forever... but at what cost? My Soul, His Promise is a dark, atmospheric historical fantasy romance set against the haunting beauty of 17th-century Scotland.