Set against the opulent backdrop of New York's Gilded Age, 'A Well-Behaved Woman' tells the story of Alva Vanderbilt, a woman of formidable will and ambition. Marrying into the Vanderbilt dynasty, Alva is faced with the challenge of navigating a society that shuns newcomers with new money. Determined to earn respect and sate her social appetite, she embarks on a journey of architectural grandeur, creating nine magnificent mansions and reveling in grand Balls. Yet, Alva yearns for more than just social acceptance. Defying the era's restrictive norms, she asserts her power within her marriage and takes a bold stand as a suffragette, proving that history is not merely witnessed by women but also shaped by the ones bold enough to defy convention.