Phoebe and her disabled husband, Martyn, move into a new house in a village on the edge of County Durham. They plan to lead a quiet existence, a set up that suits them both. Then Anna, who lives over the road and is bored of spending her days alone, seeks friendship with Phoebe and events take a dark turn. Phoebe has secrets and is haunted by her past and Anna's arrival in her life may prove to be the catalyst for her undoing. What is Phoebe hiding and why are she and her husband so reclusive? When Anna gets caught in a storm and is rescued by Phoebe the truth becomes apparent and Anna is thrown into danger. Is there a difference between madness and evil?