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.

An unfortunate development finds George’s new rail station under threat. Despite Agnes’ warnings, Marian continues to see Mr. Raikes, who lays his ambitions bare. Peggy learns that a publisher is interested in her stories. At a talk given by Clara Barton, Ada reunites with a childhood friend. Oscar grows attached to his plan, while Jack invites Bridget to a show.

George and Bertha extend an invite to a young man who's piqued Gladys' interest. After charming Mr. McAllister, Bertha accompanies Marian and Aurora to hear Clara Barton speak in Dansville. There, Peggy works on her article and shares the story of her first love with Marian, whose interest in Mr. Raikes continues to grow. Oscar crosses paths with a vengeful Turner.

As the city buzzes over Edison’s electricity demonstration, Bertha plans a picnic that involves Mr. Raikes — but not Marian. Agnes entreats her niece to protect the family’s reputation. George prepares for a legal battle as he bristles over Larry’s career ambitions. Bannister plots his revenge. Turner gets an unwelcome surprise.

During her first visit to Newport, Bertha follows Mr. McCallister’s lead but is soon reminded of her place. Oscar’s pursuit of Gladys is threatened by a familiar presence. George gets his day in court. Worried about Armstrong’s interference, Peggy reveals her past. Marian makes a decision about her romantic future. Bridget follows Jack across the city.

As Marian prepares to embark on a new adventure, Ada and Aurora rush to stop her before it's too late. With Gladys' debut ball fast approaching, the clash between Bertha and Mrs. Astor has consequences for all of New York society. The discovery of a shocking letter changes everything for Peggy. Baudin lays out his double life.

On Easter Sunday, Agnes informs Ada, Marian, and Oscar of her nephew Dashiell Montgomery's imminent arrival in New York. In need of a change after an emotional visit to Philadelphia, Peggy asks Marian about returning to 61st Street. Meanwhile, Bertha sidesteps Mrs. Astor to support the Metropolitan Opera House, and Oscar begins courting Gladys once again.

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.

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.

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

While Gladys adjusts to her changed circumstances, Larry runs into a familiar face. Peggy gets an opportunity from an old colleague.

Bertha helps Gladys stand up for herself. George attempts a bold business move. Peggy confides in Dr. Kirkland about her past.