London's Slough House is where disgraced MI5 operatives are reassigned to spend the rest of their careers pushing paper. But when one of these fallen spies is kidnapped by a former soldier bent on revenge, these agents soon find themselves caught in the midst of a conspiracy that threatens not only the future of Slough House, but of MI5 itself. The new novel in the CWA Gold Dagger-winner Slough-House series.