After killing 3 cops and a criminal, Sergey escape to Sweden with Mr. Luka, also Russian. The Swedish police and "Ørnen" with his new team of int'l criminal investigators look for them while investigating the dead cop's relation to Sergey.

Codename Scylla - when a financial leader, Sigurd, is found dead outside Hallgrim's hotel the team investigates, which reveals that the suspected murderer is the father of her son. The investigation also finds that financial fraud was being committed by Sigrid's company. Thea wants Hallgrim to see a therapist. Hallgrim receives a call from Sergei.

The trail of murders, including the crown witness, shows Hallgrim that he is getting dangerously close to Sergei. Nervous, Hallgrim worries for Marie's safety and spends the night at her apartment. Searching for clues in Berit’s effects Ditte receives a tip to look for the one thing that doesn’t fit the normal pattern; a plastic card that contains a map leads the team to an industrial area in the harbour and some very dangerous goods.

The police have impounded enough enriched uranium to blow up Copenhagen.

The CCTV footage from the deathbed of Russian hitman Sergei reveals that a bomb might be detonated in the center of Copenhagen.