Elly Conway is the reclusive author of a series of bestselling spy novels, whose idea of happiness is a quiet evening at home with her computer and her cat, Alfie. But when the plots of his books, centered on secret agent Argylle and his fight to dismantle a global spy ring, begin to bear an uncanny resemblance to the covert operations of a real spy organization, his tranquility only becomes more a memory. Alongside Aidan, a spy who is allergic to cats, Elly does not hesitate to take Alfie in her backpack to better embark on a race against time to the four corners of the planet in order to outrun dangerous killers and prevent his fictions to go beyond reality.