Helsinki in Summer is viewed differently through the eyes of homicide detectives Timo Harjunpää and Onerva Nykänen. Together they investigate a series of murders that plague Helsinki. This series paints a picture of the city where people are not safe on the streets or even in their own homes. For the people who live there, in the midst of the harsh crimes, it is impossible not to constantly worry about your own family and fear losing contact with your children.