A young football supporter is knocked down in a pub in Stockholm and dies. It's a seemingly meaningless attack but as detectives Paul Hjelm and Kerstin Holm begin to investigate, they realise there was something else, something even darker unfolding in the background of the pub.Meanwhile, a man is blown up in a high security prison. A massacre takes place in a dark suburb. A wealthy drug baron seems to be under attack. A high ranking police officer starts behaving strangely. There are even rumours of a forthcoming terrorist atrocity.These things are all connected - but how?