Detective Hallgrim Halgrimsson is on his way home to Iceland to visit his dying mother when he's put in charge of an emergency operation.

Marie and Hallgrim are in Sweden on the trail of police killer Sergei, and of Luka Bukanov - wanted for killing the Russian minister of justice.

Hallgrim witnesses an argument between a Norwegian businesswoman and a Danish biker at the hotel where he is staying.

After liquidating the Chief Prosecutions' Danish witness in Norway, the Russian hitman Sergei is back in Denmark.

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.

Escaping to Sweden with her pimp, Elena has left her baby in a Danish hospital.

Hovering between life and death, Hallgrim is watched over by Marie and in his hazy state, haunted by the dead Sergei.