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.

While the staff question their future in the van Rhijn household, Jack receives welcome news about his patent. After scoring a victory for the local schools, Peggy considers her future at the NY Globe. Later, Marian confesses her true feelings to Dashiell – and Bertha and Mrs. Astor make their final moves in the opera war.