Lilly is based on the remarkable story of Lilly Ledbetter, a hard-working Alabama tire factory supervisor whose singular goal is to lift her family into the middle class. Having grown up in poverty, she endures a work environment plagued by pervasive harassment for the sake of the best paycheck in her county. But as retirement approaches, Lilly discovers that the system has been cheating her, paying her close to half of what the men with the same job were earning. Outraged, Lilly fights this injustice to the Supreme Court, the corridors of Congress, and eventually The White House—all while powerful forces try to shut her down. Lilly follows the transformation of an ordinary citizen into the face of an issue, illuminating the impact a single courageous person can have.