As 165 Eaton Place reopens its doors, two new arrivals make their mark. Sir Hallam's forthright aunt, Blanche, disrupts life upstairs, while feisty new maid Beryl struggles to adjust to life in service. Meanwhile, Lady Agnes' concern for her children reveals a dark secret about Mr. Pritchard. Sir Hallam's preoccupation with Nazi Germany leads him into dangerous waters, and a chance meeting unlocks a hidden desire.