The Great War is over and a long-awaited engagement is on, but all is not tranquil at Downton Abbey as wrenching social changes, romantic intrigues, and personal crises grip the majestic English country estate for a third thrilling season. As other great houses are crippled psychologically and financially in the wake of World War I, Robert, Earl of Grantham, sticks to his duty to maintain Downton more firmly than ever. But in this changing landscape nothing is assured, and could it be that even the war-weary Crawleys must fight a new battle to safeguard their beloved Downton?
Welcome to Downton Abbey, the splendid ancestral home of the Earl and Countess of Grantham (Hugh Bonneville and Elizabeth McGovern) and their daughters, who live there under the watchful eye of the Dowager Countess (Dame Maggie Smith). The household is a complicated community, with the servants below stairs as fiercely jealous of their ranks as anyone above. From the sinking of the Titanic to the First World War, the secure and ordered world of Downton is rocked as the lives of the inhabitants are shaped by romance, ambition, and heartbreak.