In order to rescue an important witness in the process against Ukrainian arms dealer Artem Lasarew (Ulrich Matthes), Sarah Kohr (Lisa Maria Potthoff) is put on Lasarew's trail. He has kidnapped the daughter of one of the witness' bodyguards and promises to have her killed. It soon becomes clear that through the legal process as well as a quick and hard verdict, state prosecutor Anton Mehringer (Herbert Knaup) intended to force the dangerous man to reveal information behind a planned imminent attack in Hamburg. Against all orders, Sarah single-handedly takes on the fight, and it quickly becomes apparent that Lasarew has an old personal debt to settle with Sarah's highest superior, the Hamburg Interior Senator Stefan Bader (Devid Striesow). Only too late does Sarah realize that her opponent has long been using her to his own brutal end.