Adam Hollingworth’s dreams are shattered by the death of his fiancée. The demons of grief pursue him as he journeys from Australia to England to hide amidst the marshes of the Thames Estuary, an area renowned for its secrets and its smuggling. An old man and his beautiful niece introduce Adam to the world of old wooden boats and the mysteries of the marshes. Together, they reignite Adam’s passion for life. Now, Adam must fight to keep himself and the people he loves from being murdered. Whether they survive will depend on his ability to use a remarkable secret of ancient Norse navigation—the Viking Stone.