Sezon 4

Nina continues as Ivalo's police chief. Her son Santeri is with her. Stenius comes to ensure security for an international conference. Nina investigates a major accident that turns out to be a mass murder.

They want to keep the mass murder investigation a secret. Aikio smells a burnt cart. A terrorist suspect arrives in Ivalo. The threat of terrorism, mass murder, and a brilliant comet in the sky seem to be connected.

Old events related to the religious sect are beginning to unravel. Nina interrogates Ossi about the past. Marita is warned about the prophecy. Aikio is shot. The police find out who is behind the mass murder.

Aikio's condition is serious. Nina identifies the terrorist wanted by the FBI. The motive for the mass murder is confirmed. In Ivalo Visiting astrophysicist Jonathan Sprout's life is in danger

Nina finds out about 40-year-old events and who the last representative of the Taimenen family is. Jarmo and Esko drive to the wilderness church. Tuomas kidnaps Santer. A desperate Nina decides to trust the guidance.