"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 suicide 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...