Christmas Blood is a thriller-slasher about a feared serial killer, called Nissen, who has struck Norway's countryside every Christmas Eve for over 13 years. Investigators Rasch and Hansen are trying to solve the riddle before he returns. This time it appears that it is northern Norway that will face Nissen's bloodbath.

An employee at a governmental climate campaign that exterminates people’s pets, begins to question whether the campaign actually is the answer it makes out to be. He decides to do something about it. But has he misjudged the whole campaign?