Alexander Blix is a broken man. Convicted for avenging his daughter's death, he is now being held in one of Norway's high-security prisons. Inside, the other prisoners take every opportunity to challenge and humiliate the former police investigator. On the outside, Blix's former colleagues have begun the hunt for a terrifying killer. Walter Kroos has escaped from prison in Germany and is making his way north. The only lead established by the police is that Kroos has a friend in Blix's prison ward. And now they need Blix's help. Journalist Emma Ramm is one of Blix's few visitors and she becomes his ally as he struggles to make connections between past and present, between the worlds inside and outside the prison walls. And as he begins to piece things together, he identifies a woodland community in Norway where scarred inhabitants foster deadly secrets.