"Argylle" follows the thrilling adventures of Elly Conway, a recluse who writes spy novels. When her latest manuscript, about a globe-trotting spy named Argylle, seems to mirror a real-life espionage mission, Elly finds herself embroiled in a dangerous world of spies and secrets. As she teams up with mysterious agents, Elly must navigate betrayals, action-packed showdowns, and the blurred lines between fiction and reality in a race to prevent a global catastrophe.