Boy in the light of the headlights

In the lake, a girl in a ballet suit is found in the mountains high in the mountains. Nearby, the police find a page from the Brothers Lion Heart and a camera, in the lens of which the figure is scratched. "4". It soon turns out that the ballerina was killed by the injection of the antifreeze in the heart. The Holger Munk team is taken for business. Even Mia Kruger puts off her vacation so necessary to help Holger reveal this terrible crime.
Another corpse is soon discovered: the young jazzist lies on the bed of a cheap hostel, music plays, and on the wall the inscription - a quote from the cartoon "Bambi": "Watch that I can." In the lens of the camera standing nearby, you can see the figure "7".
Police puzzle: there is no connection between the victims, attempts to establish the identity of the killer also do not lead anywhere. Meanwhile, more and more corpses appear in Oslo. And none of the confused investigators realizes how the killer hid closely