Colorado, January 1977. Eighty-year-old Edith Goodnough lies in a hospital bed, IV taped to the back of her hand, police officer at her door. She is charged with murder. The clues: a sack of chicken feed slit with a knife, a milky-eyed dog tied outdoors one cold afternoon. The motives: the brutal business of farming and a family code of ethics as unforgiving as the winter prairie itself. In his...