To A More Perfect Union: U.S. v Windsor is a feature-length documentary that tells a story of love, marriage and a fight for equality. The film chronicles unlikely heroes -- octogenarian Edie Windsor and her attorney, Roberta Kaplan, on their quest for justice: Edie had been forced to pay a huge estate tax bill upon the death of her spouse because the federal government denied federal benefits to same-sex couples - and Edie's spouse was a woman. Deeply offended by this lack of recognition of her more than forty-year relationship with the love of her life, Edie decided to sue the United States government - and won. Windsor and Kaplan's legal and personal journeys are told in their own words, and through interviews with others of the legal team, movement activists, legal analysts, well-known supporters and opponents.