The Nacka Police receive an anonymous report of domestic violence. Mia receives the report and goes to see Minna, who arrived at the hospital, badly battered, with her newborn son.
Just when everything seems to be going well for Nora and Alexander, a mysterious man appears to shadow them; Pär begins the first investigation of his own case and discovers that it is related to two other cases.
When another member of the KSSS board is murdered, crime inspector Thomas Andreasson and his colleague, Mia Holmgren, look for a connection between the two murders.
Thomas Andreasson and Mia Holmgren, keep investigating the murder of well-known lawyer Oscar Juliander. It appears that he has no contact with his son. And someone has been sending anonymous threatening letters.
Thomas and Mia receive a tip-off in their search for Victor's killer and Felicia reveals that she saw Victors best friend Tobbe at the crime scene. Nora gets Vera to tell what really happened the night she was away.
A body in the water and the Stockholm police is notified. At first it seems to be a drowning accident but Thomas Andreasson, the detective assigned to the case, soon suspects that it is a murder case.
At Henrik and Noras house they are preparing for Henriks parents 40th wedding celebration. Henriks parents take the children to the beach but suddenly the children are missing.