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.

Upstanding community leader Nils has just won an award for "Citizen of the Year" when he learns the news that his son has died of a heroin overdose. Suspecting foul play, Nils begins to investigate, and soon finds himself at the center of an escalating underworld gang war between Serbian drug dealers and a sociopathic criminal mastermind known only as “The Count.”