It’s the opening weekend of deer season in Gunthrum, Nebraska, in 1985, and Alma Costagan’s intellectually disabled farmhand, Hal Bullard, has gone hunting with some of the locals, leaving her in a huff. That same weekend, a teenage girl goes missing, and Hal returns with a flimsy story about the blood in his truck and a dent near the headlight. When the situation escalates from that of a missing girl to something more sinister, Alma and her husband...