Follows the Tampere Police's Violent Crime Unit. The head of the unit, Sakari Koskinen, and his team will face, among other things, a serial killer, a failed jewel robbery, a suspicion of murder in a psychiatric hospital, arson and drug crimes around a drug gang. In his work, Koskinen has to endure brutal crimes, which is why he has difficulty finding balance and peace in his own private life. The series is based on the commissioner Kiosinen's book series created by Seppo Jokinen, which has been describing the work of police officers for almost 25 years.