M?rck 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 M?rck that all is not what it seems. Kimmie, a homeless woman with secrets involving certain powerful individuals, could hold the key -- if M?rck can track her down before they do.

On her sixtieth birthday, a woman takes her own life. When the case lands on Detective Carl Mørck’s desk, he can’t imagine what this has to do with Department Q, Copenhagen’s cold cases division since the cause of death seems apparent. However, his superior, Marcus Jacobsen, is convinced that this is related to an unsolved case that has been plaguing him since 1988. At Marcus's behest, Carl and the Department Q gang—Rose, Assad, and Gordon—reluctantly...