In a small village near Gothenburg, three members of the Schyttelius family are brutally murdered in their respective homes, and the victims’ blood is used to draw upside-down pentagrams on the walls. The investigators soon learn that the upside-down pentagrams symbolize the face of Satan. Irene Huss finds out that Sten Shyttelius, a minister, and his family, have been trying to investigate a local Satanist movement in their parish.