Lady Agnes catches the eye of charismatic American millionaire Caspar Landry, but as she and Sir Hallam look to their future, a tragic turn of events leaves their promised dreams, and a close family member, in jeopardy. Downstairs, Mrs. Thackeray makes a momentous decision that throws the running of 165 into chaos. Blanche and Mr. Amanjit continue to clash, until tragedy changes things.