In 1987, twelve-year-old Cooper Balsam's mother, Arden, disappears without a trace. Cooper's father, Percy, a Vietnam veteran struggling with PTSD, doesn't seem too concerned. "This isn't the first time. She's done it before." As days pass, Cooper begins to act out and withdraw from the world, and his growing animosity toward his father's ambivalence begins to escalate even as Percy and Cooper begin to actively search for the woman in their lives. From the hills of Southern California, to the deserts of Arizona, and down to the beaches of Mexico, the father and son will look for someone who may not want to be found for reasons they don't yet understand.