In a psychiatric hospital, an alleged serial killer, his therapist, and a police detective seek to solve a brutal cold case before their obsessive quest for the truth consumes them all.
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.
Roosa and her teen kids have just moved in with Roosa's new husband and his kids, when a schoolgirl is found nearby, stabbed to death. To her horror, Roosa starts suspecting her 16-year-old son Joel.
