With new information about Aaron Peel, Villanelle goes undercover as a New Yorker named Billie to befriend Aaron’s sister, Amber but there is conflict between Villanelle and Aaron.

Following her assignment in Bulgaria, Villanelle’s handler Konstantin is concerned about her increasing recklessness. He informs her that a covert MI6 task force, led by Eve, is investigating her string of assassinations

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.