Jan Michelsen comes across a 10-year-old case from the same neighbourhood where a 17-year-old girl has gone missing on her way home from a party.

Jan and Louise's investigation into Natasha's murder leads them to suspect Anders Kjeldsen, and Emma attempts to comfort a traumatised Julie.

Jan and Louise come across an unsolved murder case in Sweden that is similar to Natasha's, and on a farm that Anders Kjeldsen stayed at as a child, the police make a terrible discovery.

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, the first victim, 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.