1911. At the age of fifteen, fun-loving Mary Kirk and indomitable Wallis Warfield meet at summer camp. Their friendship will survive heartbreaks, separation, and the demands of the British Crown, until it is shattered by one unforgivable betrayal…

1997. Rachel’s romantic break in Paris with her fiancé is tragically interrupted when the car ahead crashes. Inside was Princess Diana. Back in Brighton, Rachel is haunted by the accident, and intrigued to learn the princess had visited the last home of Wallis, the Duchess of Windsor, only hours before the crash. Soon, the discovery of a long-forgotten link to Wallis Simpson leads Rachel to the truth behind a scandal that shook the world…