Detective sergeant Timo Harjunpää of the Helsinki Violent Crime Unit loses his daughter in a tragic way. Despite the support of his closest colleague, Constable Onerva Nykänen, Harjunpää is unable to recover from the loss of his family. He seeks revenge against his daughter's killer, while in his work he investigates strange deaths in the Helsinki metro that turn out to be the work of a serial killer.
Helsinki in the summer is shown differently through the eyes of the homicide unit detectives, Timo Harjunpää and Onerva Nykänen; painting a picture of the city where people are not safe in the streets or not even in their own homes. In the midst of the hard crimes it is impossible not to feel the constant worry about your own family while being afraid of losing touch with your children.
Inspector Timo Harjunpää works on harassment and extortion campaign case against successful computer expert.
