After finding the last victims, the rescue operation ends. But surprisingly, concrete worker Hasan Dahir is found alive. Marita soon realizes that he and other eyewitnesses are hiding information. The team learns that according to the work schedule, Dahir should not have been on the construction site at all on the day of the accident. The investigation also requires searching for physical evidence in the rubble. At the same time, the Paaniots struggle with the grief caused by Linnea's death and the crisis in the company. Mistakes made in the management and implementation of the construction work come to light, and strange activities at the construction site shortly before the accident raise questions. In addition, her father's visit opens old wounds in Marita's life.

The decision to call the police in complicates the investigators' relationship. Key witness Hasan is no longer willing to cooperate, and the investigation stalls. Despite solid evidence of the collapse, the cause remains unknown. During the investigation, Marita encounters a violent subcontractor. The encounter deeply shocks her and makes her question her own decision to put the investigation ahead of her personal safety. As software expert Eero assists the team in the search for the missing explosives, a clear attraction develops between him and Marita.