Detective William Wisting discovers a corpse at a Norwegian Christmas tree farm.
FBI agents help Wisting in his search for American serial killer Robert Godwin.
Wisting and the FBI believe Godwin may have a connection to 12 missing person cases in Norway; a convicted killer is released from prison after serving 17 years.
Line's obsession with Viggo leads her to fight with Wisting; Wisting and the FBI discover more corpses and pressure builds.
Wisting's worst nightmare becomes a reality as the hunt for the killer intensifies; the Viggo case crosses paths with the Godwin case.
Wisting faces evidence tampering accusations over a previous case; Line attempts to keep her father's name out of the headlines.
Sven Nordin
William Wisting
Thea Green Lundberg
Line
Mads Ousdal
Hammer
Gard B. Eidsvold
Frank Robekk
Lars Berge
Benjamin Fjeld