Season 1
The recently widowed police officer Iris Broman travels from Stockholm to Ystad in southern Sweden, where she will reside in her sister's home while taking up the new position of leading the cold case unit in Malmö. A body is found and there is an unsolved murder from over 10 years ago, and Broman also has to deal with her personal trauma and complex relationship with her sister, Kattis. Kattis is married to a French man and her children are bilingual, while Broman has no children and no desire to have any.
01. Benjamin
Iris Broman leaves her old life in Stockholm and shifts to her half-sister's house near the sea in Ystad. She joins the Kalla Fall group in Malmö as the new manager. On the day Iris begins her job, a skull is discovered in the forest.
02. The Alibi
The probe into the disappearance of Benjamin continues; Iris and Jens successfully find new leads, despite Kerstin's refusal to keep pursuing the case.
03. Wild Tracks
Iris is becoming increasingly frustrated with the lack of progress in Stockholm. At work, her co-operation with Kerstin is faltering and she is also annoyed that she is not left alone at home. Iris wants to continue investigating Benjamin's disappearance despite Kerstin's protests.
04. Stockholm
Iris goes to Stockholm to identify a suspect in Christian's murder; Iris's former colleague Adam runs into trouble when she takes things too far and engages in the investigation; the Benjamin case is wrapped up and put on the shelf.
05. The Recognition
Iris is back in Malmö and continues the Benjamin case investigation; Iris gets into a fight with Kattis and goes to a hotel to be alone, but the memories of Christian haunt her.
06. The Atonement
Iris refuses to let go of the Benjamin case and suddenly various pieces fall into place; when Kattis helps Iris learn the truth about Christian, the sisters re-evaluate their relationship.