Almost two years later - A woman is brutally murdered on Pepparholm island at the base of the bridge. It turns out that the murdered woman is Margrethe Thormod, General Director of the Migration Agency in Copenhagen, and there may have found a motive in the scandal around a deportation decision that has gotten a lot of attention, and recently affected Margrethe personally. Henrik Sabroe starts to investigate the macabre murder with his Danish colleague, Jonas Mandrup. Henrik misses his colleague Saga Norén, who is incarcerated in the women's prison in Ystad, convicted...
Henrik and his new colleague, Jonas, continue to investigate Margrethe Thormod's murder. Their two main leads are the radical leftist group, Red October, and the missing refugee, Taariq, who has gone underground after having his asylum application rejected. Margrethe's husband Niels Thormod is grieving and doesn't think that the police are doing enough to find Margrethe's killer. Saga is in the hospital. She has now been declared innocent and wants to start working again. Henrik wants to have her on the investigation and Lillian finally accepts this. Saga quickly ...
Henrik and Saga suspect that Taariq and the disappeared expert on radical leftist groups are hiding something, and they cooperate when it comes to revealing this, but they are not on the same page in regards to how they should handle the homeless girls, who are still refusing to tell anyone their true identity.
Taariq recognizes a car related to the case. He wants to push the owner for money, but is himself accused of robbery. Saga fears that will be more murders and Henrik's efforts for the homeless girls ends up in disappointment.
Saga and Hendrik keep searching for a link between the murder victims. Lilian is reprimanded by her superiors. Dan finds out where his ex-wife and son are and causes trouble. The relationship between Saga and Hendrik is tested to the limit and may have hit its breaking point.
The inquiry into Tommy continues and Solveig still refuses to cooperate. She talks neither with Saga nor Jonas. The question is how long they can keep her in holding if they do not obtain any evidence. Lillian is still under pressure from the management to find the culprit, and now it seems that there is a leak in the department. In the meantime Saga makes a breakthrough in the search for Henrick's family.
Henrik and Astrid are trying to get used to being father and daughter again. Meanwhile Saga gets a breakthrough and the murderer is revealed and arrested under dramatic circumstances. The murderer even confesses to the six killings/revenges. But Saga discovers something which doesn't fit. She goes back to the prison in Sweden and talks to the girl who almost killed her, and here she gets a terrible suspicion: there is another killer - and there is still one person left to be a victim!