The true story of England's vanished regiment is revealed. It is one of the most compelling and curious legends of the First World War. Led by Captain Frank Beck (David Jason), a favorite agent of King George V (David Troughton, Madame Bovary), Sandringham Company was comprised entirely of servants, grooms and gardeners from the King's Norfolk Estate. On August 12, 1915 the unit marched into battle against the Turks in Gallipoli and simply vanished, never to be heard from again. Queen Alexandra, played by Dame Maggie Smith (Harry Potter and the Sorcerer's Stone, A Room with a View), was the driving force behind the investigation into the real fate of the battalion. But despite her extensive inquires, no trace of the men was ever discovered. Now, All the King's Men brings the details of what really happened in 1915 to the screen for the first time. It tells the story of these amateur soldiers, the idyllic life and loves they left behind in the quintessential English country estate and the horrors of an ill-prepared campaign to which they were subjected.