It is the autumn of 1924 and Rose's father-in-law Lord Sinderby has rented Brancaster Castle in Northumberland for the grouse shooting season. The Crawleys are invited to join the party. Although there is good sport, a butler with an axe to grind and a scandalous secret threaten to derail the holiday. As the two families get to know each other better, some new faces arrive on the scene. Back at Downton Abbey, the servants hold the fort - and there are some surprising romantic moments. Behind bars, Anna continues to face an uncertain future, while Bates takes drastic measures to clear her name. Christmas is celebrated at Downton. As the family and their servants enjoy the festivities, there is romance, a heart-breaking farewell, sad memories of lost loved ones and a joyful reunion. (thetvdb.com)