The entire household is shaken by bad news from the front, and Daisy's relationship with William moves faster than she would like. Meanwhile, Mary pays a high price for obtaining Carlisle's assistance when Vera returns to Downton threatening to expose old secrets.

As the residents try to return to normal life following the armistice, a new development stuns them. Meanwhile, Carlisle puts Anna in a difficult position, Bates reels from the news about Vera, and Thomas embarks on a new money-making scheme.