
Byrne takes on the role of Rayna, a beautiful and privileged Oxford-educated daughter of a recently deceased arms dealer who becomes frenemies with Susan Cooper, a novice spy who gears up for action after Fine (Law) suddenly goes off the grid during a dangerous assignment. Agent Cooper leaves her dreary desk job behind, entering the world of international espionage in Europe. Soon, Rayna and Susan butt heads when Rayna has come into possession of an unusual inheritance, a small tactical nuclear weapon enough to give the world a total meltdown.
Rose Byrne says her character is all about status. Rayna wears garish outfits for grand entrances into the finest hotels. Perpetually bored and unimpressed, she lacks a sense of humor and has a brutally direct manner of speaking. “I liken her to royalty, or a member of a corrupt dynasty. She’s posh and talks as if she’s from another era, an effort to compensate for her poor Bulgarian roots.” Despite her coldness, Rayna feels slightly sympathetic and curious about Susan, who reminds her of a “sad Bulgarian clown.”