As the world mourns the loss of Diana, Princess of Wales, one young woman uncovers a forgotten story of passion, betrayal, and a scandal surrounding the British crown in this unforgettable novel by the bestselling author of The Secret Wife. Two women who challenged the Crown. Divided by time. Bound by a secret... 1911: When fifteen-year-old Mary Kirk meets Wallis Warfield at summer camp, she´s immediately captivated by her fearless, brazen, and self-assured personality. And Wallis has a way with the boys who are drawn to her like moths to a flame. Though Mary´s family isn´t crazy about her new best friend, she steadfastly stands by her side--even years later when they´re adults and rumors swirl about Wallis and her reckless behavior with none other than the Prince of Wales. But when Mary´s loyalty to Wallis comes into question, their friendship will be put to the ultimate test. 1997: After a romantic proposal in Paris, Rachel and her fiancé Alex are in a cab when suddenly the car ahead crashes. They´re stunned to learn Princess Diana is in the car. By the wreckage, Alex finds a heart pendant with an engraved letter "J" and Roman numerals XVII and gives it to Rachel to hold. Haunted by the crash and Diana´s subsequent death, Rachel is intrigued when she discovers that Di had visited the last home of Wallis, the Duchess of Windsor, only hours before the accident. Eventually, the revelation of a long-forgotten link to Wallis Simpson leads Rachel to the truth behind a scandal that shook the world...