As the opera war heats up, an unlikely guest attends Bertha's Met fundraiser, while Agnes backs Mrs. Astor's effort to preserve the Academy's dominance. Meanwhile, Peggy offers to travel with Mr. Fortune to Alabama to cover a story about the Tuskegee Institute, Ada organizes a special luncheon for Mr. Forte, George attempts to sway Henderson, and Watson considers an offer.

While Ada questions whether to move forward without her sister's support, Agnes faces the prospect of living alone. In Newport, Bertha puts the finishing touches on the event of the season as Mrs. Winterton plots her revenge. After experiencing the best of the Tuskegee Institute, Peggy and Mr. Fortune witness the dangers of the South firsthand.

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.

As George faces opposition for a new railway plan, Bertha prepares for the Duke's return, and Ada finds purpose in the temperance movement.

Amid their domestic quibbles, Agnes and Ada welcome the Scotts into their home. Bertha and George disagree about Gladys's future.