Folge 1 S3, E1: Denmark is the midst of a election race, set against the backdrop of the financial crisis. With ten days to go to the election, Detective Chief Inspector Lund prepares to celebrate her 25th year in the police force and looks forward to the prospect of a new job in the force. However, her relative peace is shattered when body parts are found at a Copenhagen dock only hours before a scheduled visit by the prime minister.
It is Sarah Lund's last day as a detective with the Copenhagen Police department. When a 19-year-old girl is found raped and brutally murdered, Lund is forced to head the investigation. Local politician Hartmann is fighting a hard mayoral election campaign when suddenly evidence links the city hall to the murderer. But is he really the murderer? Spanning twenty episodes, each episode a day in the investigation, suspect upon suspect is sought out as violence and political pressures cast their shadows over the hunt for the killer.