What begins with a simple murder suddenly turns into a series of bizarre killings. Chief Inspector Mike Köstner has barely time to begin the investigation into one crime, as the next takes place. The hunt for a brutal revenge killer begins, exposing at the same time the darkest side of our society.
As the number of victims increases, Mike begins to doubt everything he has stood for in his career and sees the lines between murder and justice, killer and victims, become increasingly blurred.
This thriller raises one of the most prevalent issues of our time. One of the worst of all crimes, that can take place behind every door.