Psychopathic Villanelle—a young and prolific assassin—leaves a trail of high-profile murders across several countries. MI5 officer Eve Polastri connects a new assassination in Vienna to a series of such killings which she has been researching in her own time.

Villanelle calls Eve to come to the cafe and bring her passport and Konstantin. Eve and Konstantin have a confrontation with Villanelle in a cafe;

There are hints that Elena and Kenny may have a romantic relationship. Villanelle breaks into Eve’s home to talk to her, and takes her phone, which Villanelle uses to track down Frank at the safe house and kill him.

Villanelle approaches Carolyn and offers to turn into a source for MI6; Carolyn rejects her when she can’t give any data. Villanelle then, at that point approaches Eve and requests that she recover a bundle Konstantin had stowed away to help his departure.

Villanelle tries to get Eve’s attention with an assassination in Amsterdam based on The Corpses of the De Witt Brothers but is angered when Eve does not show up to investigate.

Aaron apologises to Villanelle and invites her to go to Rome. Villanelle interrogates Niko whilst Eve visits the psychologist. In Rome, Villanelle discovers Aaron’s plans but Eve becomes jealous of their relationship.

Eve gets drunk at Kenny’s funeral when she learns his death was declared a suicide.