When the plots of reclusive author Elly Conway's fictional espionage novels begin to mirror the covert actions of a real-life spy organization, quiet evenings at home become a thing of the past. Accompanied by her cat Alfie and Aidan, a cat-allergic spy, Elly races across the world to stay one step ahead of the killers as the line between Conway's fictional world and her real one begins to blur.

Argylle gets some mileage out of its silly, energetic spin on the spy thriller, but ultimately wears out its welcome with a convoluted plot and overlong runtime.

Argylle is an entertaining spy comedy with over-the-top action and plenty of surprises, although the fun starts to run out toward the end of its overlong runtime.