1882. After the death of her father and accompanied by Peggy Scott, Marian Brook travels to New York to live with her aristocratic aunts, Agnes van Rhijn and Ada Brook. Meanwhile, determined to break into society, ruthless tycoon George Russell and his ambitious wife Bertha move their family into a lavish mansion across the street and prepare to throw their first soirée.

As George heads to Pittsburgh to deal with the potential strike, Bertha learns that the Duke will return for the Metropolitan Opera's opening night. While the staff chip in to help Jack, Bannister tries to retrieve an incriminating letter from the Russell house. Ada and Luke return from their honeymoon and Marian receives an invitation from Dashiell.

Against the backdrop of the biggest event in New York City's history, Bertha reconsiders her loyalty to the Met. Meanwhile, an engagement celebration leaves Marian with doubts, Peggy strives to make a difference in Brooklyn, George strikes a deal with Mr. Henderson, Oscar makes an alarming discovery, and the van Rhijn household reels as Luke's health deteriorates.