Follow psychologist and ex-FBI profiler Inger Johanne Vik as she finds herself and her autistic daughter drawn into an investigation surrounding a series of disturbing and brutal deaths. The case leads her to team up with detective Ingvar Nymann and together they set about uncovering clues to these shocking crimes. As the number of mysterious murders starts to increase, Inger is driven by her need to protect her daughter and starts noticing a pattern. But her discovery of the killer's weakness and the connection to a ruthless international network unintentionally turns the entire threat towards herself and her family.
Inger has been working as a profiler for the FBI, but is now back in Sweden with her two daughters. Everything is going smoothly until her autistic oldest daughter Stina witnesses a brutal murder.
Inger is beginning to realize what her daughter has been through. She goes to Uppsala to investigate the murder of bishop Elisabeth Lindgren, which took place late on Christmas Eve.
After much contemplation, Inger agrees to be a part of the investigation. At the same time, she is trying to understand how the information she gets from her daughters comes together; are the murders related?
When Lennart Carlsson is taken in for questioning by the police, Inger realizes a connection between her private life and Carlsson. How is her family connected to the investigation?
Ingvar finds a trail that supports Inger's theory about the motive for the murders. She remembers something from her time with the FBI that seems to have something to do with the case; maybe they can help her understand what?
The noose is tighter than ever around Marcus' neck, what is he hiding? In the middle of a walkthrough of the offender's MO, Inger discovers a frightening connection between the killer's profile and her own daughter.
Inger is getting closer and closer to exposing the killer, but she discovers a horrifying message planted in her home. She is convinced that the key to it all is underneath the black color on the wall.
Stina makes a decision that puts both her and her little sister in danger. Inger and Ingvar see the motive of the killer wide and clear, but disagree on how to proceed. There is one victim left. Who is it and will they get there in time?
