Herbert Molin, a retired police officer, is living alone in a remote cottage in the vast forests of northern Sweden. He has two obsessions: one is the tango and the other is a conviction that he is being hunted. Molin has no close friends, no close neighbours, and, by the time his body is eventually found, he is almost unrecognisable. Lindman, a police officer on extended sick leave, decides to involve himself in the case.
What he discours, to his horror and disbelief, is a network of evil almost unimaginable in this remote district, and one which seems impossible to link to Molin's death.