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 which throws the running of 165 into chaos. Blanche and Mr Amanjit continue to clash until a heart-breaking cause compels them to reconsider their differences.