Weeks after the evacuation of Dunkirk, Germany is poised to invade a near-defenseless Britain. To safeguard the Crown Jewels from the Nazis, Winston Churchill devises a daring gamble to have them shipped overseas. The priceless artifacts will be secretly removed from the Tower of London and driven north to Scotland by two operatives posing as a young married couple, to be taken from there to Canada. Caitrin Colline -- a Welsh coalminer's daughter...