Pastor Sten Schyttelius and his family are found dead in their respective home, all shot with a rifle. Several inverted pentagrams – the image of the devil – have been drawn on both crime scenes with the victims’ blood. Irene and her team quickly establish a link with a similar case that happened few years ago – known as the “purple pastor” case - which they didn’t manage to close. Back then, all the evidence suggested that it was perpetrated by a group of Satanists…