Feef Symonds, a young British woman, sets out to become a spy after World War II, seeking a life of excitement and purpose. However, her plans are disrupted when her American lover, working for the US intelligence, recruits her to work for the Americans. Feef becomes a civil servant secretary, tasked with uncovering Russian moles believed to have infiltrated the British government. As tensions rise and alliances are tested, Feef learns that in the world of espionage, trust is a luxury she can no longer afford.
Londoner Feef Symonds is seduced by a rogue US agent with a hidden agenda.