Based on an original idea by best-selling Danish novelist Elsebeth Egholm, the series follows the inquiries of a special unit at Copenhagen's police force, consisting of detective inspector Katrina Ries Jensen and forensic psychiatrist Thomas Schaeffer. The pair specialise in serial killers that do not fit within traditional behavioural patterns.

When Anders Bo begins his new job as a car salesman, he is given the special task of infiltrating the small competing car shop, Holger's Auto during their annual Christmas party and steal their customer file. As Anders Bo romps through the commotion and antics of the celebration, he realizes that his assignment in fact relates to an old family feud and that the odd and funny characters working there might have more to offer than meets the eye - especially Amalie, the beautiful daughter of the owner, Holger. In the middle of Christmas pudding and Christmas cheer Anders Bo suddenly learns to listen to his heart.

Jonas is a Copenhagen homicide scene photographer, happily married, with two kids. One day, his car stalls, another car slams into him, runs head on into a third car and flips into the ditch. The other driver, Julia, is critically injured. He visits her in the hospital and is greeted by her family, who assumes he must be the Sebastian she told them about, the new fiance she met in Vietnam.

Finally, Viktor becomes a fireman, while Anja still do not have the great success of the advertising agency. Fortunately, they have each other and everything is bright as Anja gets a great opportunity at the office while being pregnant. Then Viktor just figure out how to be soft father, understanding man and tough firefighter at once. But how hard can it be?

The Killing is a Danish police procedural set in the Copenhagen main police department and revolves around Detective Inspector Sarah Lund and her team, with each season series following a different murder case day-by-day and a one-hour episode covering twenty-four hours of the investigation. The series is noted for its plot twists, season-long storylines, dark tone and for giving equal emphasis to the story of the murdered victim's family alongside the police investigation. It has also been singled out for the photography of its Danish setting, and for the acting ability of its cast.

The Killing is a Danish police procedural set in the Copenhagen main police department and revolves around Detective Inspector Sarah Lund and her team, with each season series following a different murder case day-by-day and a one-hour episode covering twenty-four hours of the investigation. The series is noted for its plot twists, season-long storylines, dark tone and for giving equal emphasis to the story of the murdered victim's family alongside the police investigation. It has also been singled out for the photography of its Danish setting, and for the acting ability of its cast.