Inside a dimly lit club deep in sunken Greece, cunning, flamboyant, and all-around brave undercover agent Aubrey Argylle (Henry Cavill) makes moves (literally and figuratively) on terrorist LaGrange (Dua Lipa), a member of a terrorist organization. The evil spy organization known as the Division. He suddenly reveals that his identity has been blown. While trying to track down Lagrange, Argylle is devastated to see a member of his team, master tech genius Keira (Ariana Debose), seemingly fatally shot. Ordered by his superior, Fowler (Richard E. Grant), to continue the pursuit, Argylle eventually gains the upper hand, thanks to his trusted friend, Wyatt (John Cena). But things get worse when LaGrange reveals that Fowler is secretly the head of the Division alongside the good guys. LaGrange kills himself, Argylle and Wyatt cut off communication with Fowler and wonder what their next move will be.
In the first of many rug-pulling incidents in “Argylle,” it is revealed that the incident was merely a fictional account of Book 4 of the “Argylle” novel series, written by accomplished author Elly Conway (Bryce Dallas Howard). I am writing after a debilitating ice skating accident. Although fairly single (except for her cat Alfie), Elly is described as having an affair with her work and turning down dates so she can work on Book 5. After finishing the manuscript, Elly wakes up to find that her mother, Ruth (Catherine O’Hara), has already read the book and is not happy that it ends in the “escape” way only a mother can. Promising her mother to meet her over the weekend and write a new final chapter, Elly takes an Amtrak to go home due to her fear of flying.
On the ship, she is harassed by Aidan (Sam Rockwell), a persistent “fan” of her books. Aidan (Sam Rockwell) soon claims that he is a real spy and says he is in danger. Elly is suddenly attacked by numerous assassins and the pair only manage to escape with Aidan’s help as they parachute from the train.