In a world where cold and loneliness seem to be the norm, a 16-year-old girl has been raised in the forests of Finland with a single purpose: to become a perfect assassin. Hanna, with outstanding physical and mental abilities, was trained by her father, a former CIA agent, who prepared her to confront a dark past and escape the pursuit of a powerful organization. When Hanna finally ventures outside her isolated home, she finds herself immersed in a completely different world, full of dangers and deceit.
As she begins her mission, she encounters a family that temporarily takes her in, giving her a glimpse of what it means to be a normal teenager. However, her past comes back to haunt her in the form of a relentless CIA agent determined to eliminate her. As Hanna embarks on a dangerous journey across Europe, she must navigate a landscape of betrayals, family secrets, and a constant struggle for survival.
Tension mounts as the clock keeps ticking and the forces pursuing her close in, forcing her to confront not only her enemies but also her own identity. In a fascinating twist, Hanna's journey is as much a quest for revenge as it is an exploration of the nature of true humanity, grappling with the dilemma of being a weapon or becoming a person in her own right.