On a trip with her two children to the beach, Nora Linde discovers a body in the water. Inspector Thomas Andreasson,is assigned the case, and dismisses the initial assumption of drowning, suspecting murder.

The police have a suspect but Nora continues to involve herself in the investigation. After a chance meeting with inspector Thomas, she gives information that seems to lead to new clues. Then, a second body is discovered.

During preparations for a 40th wedding celebration, Nora's own children go missing at the beach. The search leads to a macabre discovery that pulls the case many years back through history...

On a beautiful July day, a party gathers to watch the finish of the Round Gotland Race. The celebration comes suddenly to a halt when captain of a boat is shot, and inspector Thomas Andreasson called to investigate the murder.

Inspector Thomas Andreasson and his colleague, Mia, continue to investigate the murder of lawyer Oscar Juliander. They discover he had been receiving threatening letters - is the answer within the family? And who is sneaking around the empty house?

When another member of the KSSS board is murdered, Thomas must look for a connection between the murders. Is the KSSS board being targeted or is there another motive? Nora realises that the killer is closer than she thought.