In the Regency England setting of 'The Ladies Rewrite the Rules,' Diana Boyle, a resolute and wealthy young widow, is determined never to remarry for convenience or wealth. Her fortitude is tested when she learns of her inclusion in a directory of affluent, single women aimed at aiding financially strapped gentlemen seeking prosperous wives. Incensed, Diana confronts Maxwell Dean, creator of the 'Bachelor's Directory,' only to find that his charm belies his unsavory undertaking. Unimpressed by Max's reasoning that the directory helps men like him secure a stable future, Diana decides to warn the other listed women. Together, they form a pact to overturn the societal norms that have long favored men, commandeering their newfound influence to dictate their romantic fates. As they navigate through this high society tangle, the ladies concoct their own version of courtship, compelling the men to follow their lead in a humorous twist of tradition and romance.