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.

The probe into the disappearance of Benjamin continues. Iris and Jens successfully find new leads, despite Kerstin's refusal to keep pursuing the case.

Iris gets furious when Katti's issues affect her. At work, the partnership with Kerstin sizzles, but Iris does not want the Benjamin case to slide. A medium reaches out to the police and states that there is a crucial clue at the discovery site.

Iris goes to Stockholm to identify a suspect in the murder of Christian. 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 once again put on the shelf.

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.

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.