Erik is holding Marissa prisoner, trying to negotiate a deal to get him and Hanna safely out of Berlin. Hanna hides out with Dieter and his family. Desperate to know more about what her father is up to, Hanna discovers a huge secret in her own past. As an escape plan begins to form, Marissa attempts to make her own.
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.