In the aftermath of the Great War, Non Davies wakes one morning to find her husband crouching under the kitchen table in a cold sweat and with fear in his eyes, shouldering an imaginary rifle. During the intense heat of that summer she forces herself to sit and watch him, knowing she has to discover what has changed her Davey so completely. A mysterious letter addressed to Davey gives her the clue she needs and takes her to London in search of an answer. When she returns home Non realizes that the dark secrets of his behavior are working their way ever closer to the surface, secrets that will shatter the fragile happiness of their community if they ever become known.