Everyone knows the story of the Queen's father: reluctant but dutiful George VI. Most know the story of his elder brother, Edward, who rejected the throne for love. But their four siblings - Mary, Henry, George and John - have been largely forgotten. This series tells the interconnected stories of the first young Windsors. Never before seen letters and diaries belonging to the Royals reveal their hidden story across the social and political backdrop of the 1920s, 30s, and 40s. Through war, abdication and deep family divisions, the family would be subjected to unprecedented scrutiny and the parts these siblings played would shape the monarchy we know today.