This is the story about a serial killer that lived north of stockholm in Sweden. The murder doesn't work as the "normal" seriekiller. All the murders are different made. The victims are all from the same school and born on the same years, but they comes from different groups.
The police are having problems finding the motiv, not even the Swedish best professor in kriminality and serial killers have a chance in this case.
There is one that takes care of the investigation, Frederick. A swedish private investigator. he is not very much liked by the police, because of his mafia-inspired methodes.
Will Frederick succeed? How many more will have to be killed before The police or Frederick get the hold of the killer?