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.

When the police seize a consignment of enriched uranium, Hallgrim makes a deal with Sergei in order to discover its planned destination. Meanwhile, Frandsen's life hangs in the balance as he is checked for radiation sickness.

After hovering between life and death, Hallgrim survives a knife attack. He and the team must now locate the perpetrator who is fighting to control the Balkan drug trade into Scandinavia.