When Villanelle kills a Chinese colonel at a kink clinic in Berlin, Eve and Bill travel out to investigate. While Eve and Bill chase up a number of promising leads, Villanelle enjoys the cat-and-mouse of their proximity. But as they draw closer, Eve comes to realize that this is much more than a game.

Intel from Berlin points to the existence of a mole, prompting Eve to undertake her first surveillance operation. Meanwhile, Villanelle is sent to England to eliminate a member of British Intelligence. Villanelle wonders, could it be Eve?

Having survived a terrifying close call with Villanelle, Eve now has the mole ensconced in a safe house and is buzzing. They have an exciting opportunity to glean information and crack this thing open.