Documentary charting every detail of the royal family's Christmas celebrations at Sandringham. Run with military precision and steeped in tradition, the film examines what Prince Harry's then-fiancee Meghan Markle has in store as she attends for the first time and the etiquette to which she must adhere. Plus, a look at the rich history of the royal family Christmas, going back to Victorian times. Contributors include royal insiders and cultural historians.