The Guardians (2012)

Original title: Schutzengel

15-year-old Nina witnesses a terrible crime that puts her life in danger. Being an orphan, she has nobody she can trust. When corrupt businessman Thomas Backer sends five killers after Nina, witness protection officer, Max, a former special-forces soldier, is responsible for her safety. They soon overcome their initial distance to find common ground. While on the run from the ruthless Backer, Rudi, one of Max’s former comrades, comes to their rescue – and continues to help the two out of some precarious situations. Even Max’s ex-girlfriend Sara is not just there to help him as a federal prosecutor. Nevertheless, Nina and Max face ever-increasing danger, and soon the teenager is not the only one in need of a guardian angel – Max could use one too.