Charles's marriage to Diana Spencer begins as a fairy tale, wedding bells and a nineteen-year-old bride greeted by crowds outside St Paul's Cathedral, and unravels into one of the most public breakdowns in royal history. The film traces the courtship, the wedding, and the growing distance between them, drawing on archival news footage, home movies, and interviews with royal commentators and biographers who lived through the story as it broke. Camilla Parker Bowles, Charles's earlier love, resurfaces as the affair that the tabloids eventually exposed, while Diana's own unhappiness plays out in television interviews and hospital visits that made her the most photographed woman in the world. The narrative follows the separation, the divorce, and Diana's death in Paris in 1997, then moves past tragedy to the slower, more private rebuilding of Charles and Camilla's relationship that eventually led to marriage. Told mostly through contemporary footage rather than reenactment, it is a chronicle of a royal marriage that played out as a public spectacle from its first day to its last.