Argylle

Elly Conway, an introverted spy novelist who seldom leaves her home, is drawn into the real world of espionage when the plots of her books get a little too close to the activities of a sinister underground syndicate. When Aiden, a spy, shows up to save her (he says) from being kidnapped or killed (or both), Elly and her beloved cat Alfie are plunged into a covert world where nothing, and no one, is what it seems.