"New York Times and internationally bestselling author Jussi Adler-Olsen returns with the sixth book in his exhilarating Department Q series, featuring Detective Carl Mørck and his enigmatic assistants, Assad and Rose. In the middle of his usual hard-won morning nap in the basement of police headquarters, Carl Mørck, head of Department Q, receives a call from a colleague working on the Danish island of Bornholm. Carl is dismissive when he realizes...

Mørck is back. He's settled into Department Q and is ready to take on another cold case. This time, it's the brutal double-murder of a brother and sister two decades earlier. One of the suspects confessed and is serving time, but it's clear to Mørck that all is not what it seems. Kimmie, a homeless woman with secrets involving certain powerful individuals, could hold the key -- if Mørck can track her down before they do.

"The newspaper refers to her only as Victim 2117-the two thousand one hundred and seventeenth refugee to die in the Mediterranean Sea. But to three people, the unnamed victim is so much more, and the death sets off a chain of events that throws Department Q, Copenhagen's cold cases division led by Detective Carl Mørck, into a deeply dangerous-and deeply personal-case. A case that not only reveals dark secrets about the past, but has deadly implications...

Police inspector Carl Mørck and his assistant Assad investigate a cold case about a disappeared woman; when the murder of young twins implicates a group of students as the killers, Carl Mørck investigates; Department Q must catch a serial killer before time runs out.