State intelligence officer Dominika Egorova struggles to survive in the cast-iron bureaucracy of post-Soviet intelligence. Drafted against her will to become a "Sparrow," a trained seductress in the service, Dominika is assigned to operate against Nathaniel Nash, a first-tour CIA officer who handles the CIA's most sensitive penetration of Russian intelligence. The two young intelligence officers, trained in their respective spy schools, collide in a charged atmosphere of tradecraft, deception, and, inevitably, a forbidden spiral of carnal attraction that threatens their careers and the security of America's most valuable mole in Moscow. Seeking revenge against her soulless masters, Dominika begins a fateful double life, recruited by the CIA to ferret out a high-level traitor in Washington; hunt down a Russian illegal buried deep in the US military and, against all odds, to return to Moscow as the new-generation penetration of Putin's intelligence service. Dominika and Nathaniel's impossible love affair and twisted spy game come to a deadly conclusion in the shocking climax of this electrifying, up-to-the minute spy thriller.