Elly Conway is the reclusive author of a series of best-selling espionage novels, whose idea of bliss is a night at home with her computer and her cat, Alfie. But when the plots of Elly’s fictional books—which center on secret agent Argylle and his mission to unravel a global spy syndicate—begin to mirror the covert actions of a real-life spy organization, quiet evenings at home become a thing of the past.