Department Q, the cold case squad in the Copenhagen Police Department, is battling multiple crises as it struggles to track down a serial killer who is on a personal vigilante quest. At the same time, one of their own is in criminal trouble, which could mean the end of Department Q as we know it. Jussi Adler-Olsen has created a Nordic noir sensation with his Department Q novels, which not only focuses on the dark underbelly of Denmark and neighboring Nordic countries but also the personal struggles and foibles of the people who work within Department Q. This time, the squad is battling COVID quarantines as they race to find a killer who has been killing despicable business people and politicians for decades, while always making the crime look like a suicide or an accident. Like the previous novels in the series, the reader finds out who the killer is, with the rest of the book dedicated to the squad tracking down the person in question before they can strike again. The action moves fast with the short chapters and traditional Nordic crime violence.