At a grisly murder scene sits a figurine made of chestnuts. From this creepy clue, two detectives hunt a killer linked to a politician's missing child.
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.
Denmark, in the near future. One year after a major bomb attack in Copenhagen, political radicalization has intensified and ethnic tensions are increasing. As next year's parliamentary elections approach, in which nationalist leader Martin Nordahl hopes for a landslide victory, Zakaria becomes involved in a radical organization, where he befriends Ali.
