Argylle follows Elly Conway, the homebody novelist who writes about thrilling spy adventures. However, she is dragged into the actual world of espionage when her books hit a little too close to reality, gaining the attention of a deadly criminal syndicate. Aiden, an actual spy, saves her, so he says, from being abducted, killed, or both Elly and her cat, Alfie, are foisted into a world full of lies and more danger than she could have ever imagined.
https://screenrant.com/kingsman-argylle-nycc-matthew-vaughn-interview/