A forensic analyst and an investigation officer are on a chase to hunt down a gruesome serial killer and crack one of the most famous cold cases in the history of their departments.
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.
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.
Two strangers strike up a conversation on a long journey. One is a suspect in an unsolved missing person’s case and the other an undercover operative on his trail. Their uneasy friendship becomes the core of this tightly wrought thriller, which is based on the true story of one of the largest investigations and undercover operations in Australia.
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.