Set in 1882, The Gilded Age follows Marian Brook, a young woman from a conservative Pennsylvania family who moves to New York City after the death of her father to live with her wealthy, old-money aunts, Agnes van Rhijn and Ada Brook. Accompanied by Peggy Scott, an aspiring African American writer, Marian finds herself caught up in the social war between her aunts and their new neighbors, the ruthless railroad tycoon George Russell and his ambitious wife, Bertha Russell. As the industrial revolution transforms the American economy, the series explores the clash between the established aristocracy of 'Old New York' and the 'new money' families seeking to buy their way into high society. Through lavish balls, political maneuvering, and personal scandals, the characters navigate a rapidly changing landscape where status is everything and the cost of entry is often betrayal.