When detective Leo Junker receives an envelope containing a photo of a woman murdered five years previously, he knows that this is no ordinary case. He re-opens the original investigation, to the chagrin of his police colleagues, who are more concerned with catching the terrorist who has just entered Sweden after carrying out an attack in Paris. But perhaps the two incidents aren't unconnected . . .
As Leo begins to investigate, familiar faces re-appear and he is forced to confront the past he thought he had left behind.