Still reeling from her revelations about Erik, Hanna hides out in suburban London with Sophie, who is keeping her new friend secret from her parents. Sophie persuades Hanna to attend a school party where Hanna experiences the thrill of a teenage crush for the first time. Erik's friends desperately try to save him from the life-threatening injuries he sustained fleeing capture.
In a covert Romanian facility, Erik Heller evades security to rescue baby Hanna. 15 years on, father and daughter live deep in the Polish forest. Erik has trained Hanna to be an incredible killer and hunter. Yet, keen to grow beyond the boundaries of her isolated world, she begins to venture away from home. This attracts the attention of CIA agent Marissa Wiegler, who has hunted Hanna since birth.