Anders Harnesk becomes the head of the case, after the sudden death of Burlin. Mysterious notes, with names and numbers are found, and so is another victim. Evidence on the the crime scenes leads to the Sami people.
Kahina Zadi and Anders Harnesk are desperately looking for a connection between the bestial murder of Frenchman Pierre Carnot and the helicopter pilot Kambo. On a notice board in a shop Anders happens to see a note with Kambo's name and the number 20 on it. A note with Carnot's name and the number 21 is also found. Anders and Kahina realise that this is just the beginning.