"Jan Michelsen is investigating the disappearance of a young woman called Julie Vinding from a Copenhagen suburb. Six months later, Jan is the only one who believes that she is still alive. Jan finds a ten-year-old case from the same neighbourhood where a 17-year-old girl, Natasha, disappeared on her way home from a party. Jan discovers the remains of Natasha in a lake. She was murdered. Suspecting a link between the two crimes, Jan brings in an expert on serial killers, Louise Bergstein."

"Jan and Louise\u2019s investigation into Natasha\u2019s death leads them to suspect Anders Kjeldsen, a man who has been arrested before for violent crimes including rape. Trapped in a basement, Emma tries to comfort a traumatised Julie, but soon needs comforting herself."

"Jan and Louise find an unsolved murder case in Sweden that has similarities with Natasha's, although this one has an unusual signature: the victim's ring finger was cut off. Louise doesn't believe that the murder has been committed by Anders Kjeldsen. Meanwhile, on a farm that Anders Kjeldsen stayed at as a child, the police make a gruesome discovery. Stine is forced to help Anders with the women in the basement, who are planning to escape."

"Louise realises that Anders Kjeldsen does not kill alone but has a partner who is the dominant of the two. In the basement, Emma tries to persuade Stine to help her to escape."

"Jan and Louise find a dress belonging to Natasha \u2013 the first victim \u2013 which Anders Kjeldsen had hidden. That same night, Anders tries to kidnap another woman. Stine Velin attends her big brother Mikkel's 40th birthday party and reveals a dark family secret."

"The public appeal for information on Anders Kjeldsen leads to the identification of the third victim from the farm and an explanation of how all the women met their killer. Louise suspects he has a female accomplice."

"Stine Velin is taken into police custody, but insists that she is also one of Anders Kjeldsen\u2019s victims and does not know where either Anders or Emma are."

"Jan and Louise find Anders Kjeldsen. Louise fears that Stine\u2019s family is in danger and places them in a safe house."

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"Louise is determined to continue working as a profiler and when a couple is found brutally murdered, she takes on the case. She assists Detective Inspector Frederik Havgaard, who believes he knows who the killer is."

"Louise locates Bj\u00f8rn\u2019s little sister Maria. Maria's caseworker suggests that Louise mentor the young woman, who is faced with the prospect of having her child taken away from her. Meanwhile, Bj\u00f8rn is in hiding."

"The police hunt for Bj\u00f8rn is intensified. Following a search of Pelle\u2019s home, Frederik and Louise uncover truths about Bj\u00f8rn\u2019s past, and a decision is reached on the forced removal of Maria\u2019s child."

"Another crime is committed. Frederik is convinced that Bj\u00f8rn is the perpetrator, but Louise's investigations point to a different suspect. Bj\u00f8rn turns to Louise and shares a secret with her that might close the case."

"Three years on, Louise has moved to Aarhus to make a fresh start, but the past catches up with her when she meets Frederik again. He involves her in a new case in which a disabled woman has been found dead. Frederik thinks she was murdered, and the ensuing investigation seems to suggest that the dead body is a part of a larger pattern."

"Louise and Frederik discover a connection between Bj\u00f8rn and Alberte, who both grew up in the Breidablik commune. Louise visits the commune undercover in order to assist the police in their investigation and quickly notices the charismatic leader, Jon, who has a special relationship with Alberte."

"Louise tries to get closer to Jon. Alberte becomes jealous and challenges Louise\u2019s cover story. Meanwhile, Frederik discovers that one of Jon's old friends, who also owned Breidablik, perished in a mysterious fire."

"Louise and Frederik put pressure on Jon to accept responsibility for his actions, but once again he takes advantage of his relationship with Alberte. Louise decides to confront the past."

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"Forensic evidence concludes that the same person killed Patrick and Pernille. As Louise and Frederik probe the link between the victims, an old gang-related double murder emerges, suggesting a potential quadruple killer."

"In their search for Kim, a clue leads Louise and Frederik to Sweden. Meanwhile, Kim hides with his stepdaughter in a remote cottage. Louise and Frederik track Kim down, only to discover yet another devastating crime."

"Under interrogation, Kim confesses to the old double murder and the killing of his girlfriend, but not to the murders of Patrick and Pernille. Dismantling Kim\u2019s alibi, Louise has reason to come up with a new theory."

"A revelation from Kim\u2019s stepdaughter puts the spotlight on Kim\u2019s old gangleader, Robin. Meanwhile, Kim is warned to keep silent, and an attack on Robin\u2019s gang hints at an imminent gang war. Robin flees with his family."

"Louise believes Robin was killed by the same murderer as the other victims, but Frederik suspects his death was a stand-alone gang murder. However, Louise convinces Frederik that a fatal car accident links the killings"

"With Louise's world falling apart, the case is taken over by Jacob, Frederik\u2019s second-in-command. Jacob is determined to track down the killer, but must also contend with Louise - who soon discovers a shocking new lead."

"Alongside Jacob, Louise tries to prove Gunnar\u2019s guilt and uncover his motive. It appears that the loss of his daughter in a car accident and the driver's short sentence was the catalyst for Gunnar's murderous campaign."