When war erupts between England and America in 1812, it brings change and uncertainty—even to Michigan's remote Mackinac Island. For young Mary O'Shea, the hardest change is the departure of her father, who leaves Mackinac to join the American Army. With her sister and brother, Mary must tend the farm, deal with the hardships of British occupation, and hope for the safe return of their father.

The year is 1816, and the war between England and the United States has come to an end. Once again the American flag flies proudly over the remote island of Mackinac, which Mary O'Shea calls home. Now for the first time in her life, Mary is leaving that island—traveling to London to visit her sister Angelique. During her voyage on the British frigate Comfort, which will carry her from New York to London, Mary does her best to be of assistance. Although the captain does not appreciate her efforts, she captures the eye of a young midshipman named James Lindsay. Upon her arrival in England, Mary finds herself swept up into society—and learns that James is none other than Lord Lindsay, son of the Duke of Oakbridge. As the two tour London together, their fondness for each other grows. Soon Mary finds herself facing the most difficult decision of her life. Can she give up her island for a life in London society with James?

Is Mary home for good? It is the spring of 1818 and Mary O'Shea has returned from England to her beloved Mackinac Island. She loves her life on the family firm and knows that she chose wisely in declining a marriage proposal from James Lindsay, a young duke she met during her travels. She is also delighted to once again spend time with White Hawk, her dearest friend. And although he is often called away to defend Indian claims to native lands, Mary cherishes White Hawk's visits, and hopes that one day he will stay forever. Then suddenly Mary's future comes into question when James appears at her doorstep to ask for her hand—and refuses to leave until she consents. Now it seems that the only way for Mary to discover what her future holds is to uncover the truth of her own heart.