The Great War rages across Europe, and not even the serene Yorkshire countryside is free from its effects. The men and women of Downton are doing their part: heir Matthew Crawley and footman Thomas Barrow are off fighting, while Lady Grantham and Isobel Crawley are squabbling over whether Downton should be used as a hospital. Lady Mary is seeing a wealthy newspaper magnate while Lady Edith becomes much warmer and Lady Sybil seeks to ingratiate herself...