Documentary following life at Highclere Castle, best known to Downton Abbey fans as the setting for the popular period drama, following Lord and Lady Carnarvon and their loyal staff as they strive to make this year the most profitable to date, with a busy calendar of events both home and away. Lady Carnarvon becomes an unexpected tour guide for some Americans who've turned up expecting a private tour of the famous castle. Head butler Luis mans the drinks and ice-cream kiosk on one of the hottest days of spring, while head of visitor reception Paul prepares to display a precious family heirloom - a vintage 1936 Rolls-Royce