"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.