"To A More Perfect Union: U.S. v Windsor" tells a story of love, marriage and a fight for equality. The film chronicles two 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 40+ year relationship with the love of her life, Edie decided to sue the United States government and won. Beyond the story of this pivotal case in the marriage equality movement, the film also tells the story of our journey as a people, as a culture, and as citizens with equal rights. Windsor and Kaplan s legal and personal journeys are told in their own words, and through interviews with others, including Lillian Faderman, a leading scholar on LGBTQ history, and Evan Wolfson, who first at Lambda Legal and later as founder of Freedom to Marry was the godfather of marriage equality in the US and now worldwide. Legal observers, including Jeffrey Toobin from CNN and Nina Totenberg of National Public Radio, also lend their insights.