On the Basis of Sex is inspired by the true story of a young Ruth Bader Ginsburg – then a struggling attorney and new mother – who faces adversity and numerous obstacles in her fight for equal rights throughout her career. When Ruth takes on a groundbreaking tax case with her husband, attorney Martin Ginsburg, she knows it could change the direction of her career and the way the courts view gender discrimination. The film also chronicles the storybook-like romance between Ruth and Marty, a partnership that succeeded both personally and professionally.