The Killing (2007)

A young girl's brutal murder launches an extended police investigation just when Detective Sarah Lund is supposed to leave for a new life in Sweden, and she can't leave the case behind. The girl's parents and friends struggle to cope with their loss. Troels Hartmann is campaigning to be mayor of Copenhagen, but struggles when links are revealed between City Hall and the murder. Over a 20-day time-span, suspect upon suspect is sought out as violence and political pressures cast their shadows over the hunt for the killer. Two more seasons follow, about a series of killings of soldiers and the abduction of an industrial magnate's daughter.