Set in November 1916, the episode begins with the arrival of Ethel, a new housemaid, and the first appearance of John Bates' wife. With Matthew and Thomas fighting in France, those left behind at Downton organise a benefit concert to help fund the local hospital. Lady Mary receives shocking news. Branson reveals his feelings to Sybil who wants to train as a nurse

As Bo struggles to accept the new terms of her and Dyson's relationship, she investigates an apartment building full of residents who appear to have lost their minds.Kenzi's choice to employ a Brownie to help around the house threatens to backfire on her.