แผนกสืบสวนคิว: ปริศนาศพบนต้นไม้

Copenhagen, 2018. A frightening discovery is made in an old apartment. The subsequent investigation of Department Q leads them to an infamous institution for girls that was suddenly closed in the early sixties.

Denmark, 2013. Police officers Carl Mørck and Hafez el-Assad, sole members of Department Q, which is focused on closing cold cases, investigate the disappearance of politician Merete Lynggaard, vanished when she and her brother were traveling aboard a ferry five years ago.

Denmark, 2014. A former police officer asks Carl Mørck, head of Department Q, to find out who brutally killed his young twins in 1994. Although a local inhabitant confessed and was convicted of murder, Carl and his partner Assad soon realize that there is something in the case resolution that is terribly wrong.

Denmark, 2016. A blurred note is found in a bottle that has traveled across the ocean for a long time. After deciphering the cryptic note, Department Q follow a sinister trail that leads them to investigate a case that occurred in 2008. At the same time, new tragic events take place that test their faith and deepest beliefs.

Seen-it-all New York detective Frank Keller is unsettled - he has done twenty years on the force and could retire, and he hasn't come to terms with his wife leaving him for a colleague. Joining up with an officer from another part of town to investigate a series of murders linked by the lonely hearts columns he finds he is getting seriously and possibly dangerously involved with Helen, one of the main suspects.

Animal control officer Walter Sparrow becomes obsessed with a novel that he believes was written about him, as more and more similarities between himself and his literary alter ego seem to arise.

Two Los Angeles homicide detectives are dispatched to a northern town where the sun doesn't set to investigate the methodical murder of a local teen.

Dolores Claiborne was accused of killing her abusive husband twenty years ago, but the court's findings were inconclusive and she was allowed to walk free. Now she has been accused of killing her employer, Vera Donovan, and this time there is a witness who can place her at the scene of the crime. Things look bad for Dolores when her daughter Selena, a successful Manhattan magazine writer, returns to cover the story.