When Rivkah Milmanovitch arrives at Ellis Island, her husband is not waiting for her as promised. Alone and pregnant, she makes her way to the Lower East Side tenement of an old friend. Lottie Aarons, whose husband went out for a newspaper and never returned, takes Rivkah in and they work side-by-side in dispiriting sweatshops. Rivkah gives birth to a daughter, Mimi, determined that her child will have a better life in America.

Frederick Winthrop, slum landlord, lives in one of Fifth Avenue’s sumptuous mansions–and preys on young girls. When he serendipitously meets fifteen-year-old Mimi, who dreams of silks, satins and velvets, imagines costumes and ball gowns, she is easily seduced, and her life takes an unexpected turn. To avoid scandal, the Winthrop family offers Mimi a rare opportunity. While Lottie, now a bookkeeper in the employ of the Winthrops, wisely advises her, Mimi knows exactly what she wants. But as she rises to international fame, she must struggle with the secrets of her past and protect those she loves.

Part history, part romance, with a twist of gothic, The Winthrop Agreement is a spellbinding tale of a determined heroine who will entrance Bridgerton and all historical fiction fans.