This work investigates the systemic failure and alleged internal sabotage that led to the collapse of the Special Operations Executive (SOE) intelligence network in occupied France during the Second World War. Author Robert Marshall examines the bureaucratic friction between MI6 and the newly formed SOE, arguing that institutional rivalry and the actions of double agent Henri Dericourt resulted in the catastrophic compromise of nearly 1,000 operatives. By analyzing archival records and intelligence reports, the book constructs a case for a deliberate betrayal orchestrated by British intelligence leadership to undermine a rival agency.

The subject matter points to a dense, investigative historical account that prioritizes institutional accountability and the mechanics of wartime espionage. The framing suggests a critical, specialist-level examination of intelligence failures that will appeal to readers interested in the darker, often overlooked administrative conflicts of the Second World War.