Gemma and Will are shattered when their son dies in an accident. Gemma blames herself and starts to have panic attacks that affect her eyesight - and the audience's point of view. Will, tormented, believes he is hearing his son's voice calling out to him. To escape their grief, Gemma suggests they take up Paul's offer to stay at his Lake District country getaway. Gemma's, helped by ex-pharmacist Paul, tries to stop her panic attacks with medication.