Markus Viitanen, a sculptor living in Suomenlinna, has not seen his son Eero for fifteen years. When he learns of Eero's death, he sets out to find out what kind of person Eero grew up to be during his nineteen years of life, and how the nanny Katri relates to the rest of Eero's life.
In the middle of the summer holidays, the body of a drowned man with ligature marks on his wrists is recovered from Tammerkoski river. The investigation by Koskinen's team is further strained by the hit-and-run case of a dubious music manager and the mysterious Carl Friedrich. When a new body is found in Lake Näsijärvi, the connection between the victims is made clear.
