In his work as a Miami crime scene investigator, Dexter Morgan is accustomed to seeing evil deeds. . . particularly because, on occasion, he commits them himself. But Dexter's happy existence is turned upside down when he is called to an unusually disturbing crime scene at the university campus. Dexter's Dark Passenger – mastermind of his homicidal prowess – immediately senses something chillingly recognizable and goes into hiding.

Dexter is alone for the first time in his life, and he realizes he's being hunted by a truly sinister adversary. Meanwhile he's planning a wedding and trying to learn how to be a stepfather to his fiancé's two kids – who might just have dark tendencies themselves. Macabre, ironic, and wonderfully entertaining, Dexter in the Dark goes deeper into the psyche of one of the freshest protagonists in recent fiction.