In 1913, on a summer's day at Half Moon Lake, Louisiana, four-year-old Sonny Davenport walks into the woods and never returns. For two years, the Davenports search across the South, offer increasingly large rewards and struggle not to give in to despair. Then, at the moment when all hope seems lost, the boy is found in the company of a tramp. But is he truly Sonny Davenport? As the tramp's kidnapping trial begins, and two desperate mothers fight for ownership of the boy, the people of Opelousas discover that truth is more complicated than they'd ever dreamed.