Mr Standfast is the third of five Richard Hannay thrillers. Brigadier-General Richard Hannay is recalled from active service on the Western Front and tasked with a secret mission to catch a dangerous German agent who is at large in Britain. Travelling incognito, he infiltrates a community of conscientious objectors with the aim of ferreting out the spy. During this adventure, Hannay at last finds love - in the form of 18-year-old Mary Lamington.