Wisting and his team suffer a terrible blow when a crime scene inspection with serial killer Tom Kerr goes horribly wrong.

Wisting tries to unite the team after the tragedy that has struck them. He's forced to cooperate with Special Investigator Stiller in the hunt for the mysterious accomplice called "The Other." Line has doubts about continuing her documentary when she is contacted by someone very close to Kerr.

A new disappearance makes Wisting and Stiller fear that the killers are about to flee the country. But has the new victim really been kidnapped? A fresh lead brings the police to apprehend a suspect with surprising results. Line discovers that someone has leaked her sensitive material to the media.

Line's shocking discovery forces the police to reevaluate their profile of "The Other." The killer is cleaning up loose ends and time is running out. Wisting discovers the painful secret his daughter has kept from him. But will they be able to stop the evil that has caused so much harm?