A bomb goes off in the Islamic Council’s building in Oslo, killing several of the Council’s members. The Police and Security Service suspect an Islamist organization to be behind the attack; a feeling that only grows stronger when yet another, bigger explosion rocks the capital.
After years on the outside, Hanne Wilhelmsen is back among the Oslo police. As a special adviser she has no official ties to the Security Service, but after the attack she’s approached by an old friend, Billy T, whose son has undergone some disturbing changes as of late.
As she tries to help Billy, the mood of the city takes a turn for the dangerous, and Hanne realizes that Oslo is facing a far greater threat than they have ever seen before.