Young, energetic, and determined undercover police officer Nicholas Grenier is the shining star of the Hartford Police Department. For two years Grenier infiltrated the top levels of the drug trade in New England and is preparing for the biggest bust of his career-a bust that will topple the narcotics underworld like dominoes. But the bust is almost botched and in the process Grenier's cover is blown, ending his undercover narcotics career. Though he is quickly promoted to detective, he becomes increasingly depressed and angry. Fearing his career itself is coming to an end, Grenier takes a leave of absence, not planning to return. Unfortunately for Grenier, someone else has other plans for him. He calls himself The Nemesis. Having waited years for just the right detective to come forward to begin his murderous game, he draws Grenier into the investigation. With only his instincts to guide him, Grenier takes over the investigation of this uncanny killer who seems to know more about the Grenier than Grenier knows about himself. As the killer claims responsibility for three murders in the span of a week, Grenier desperately tries to find any clues that could lead him to this maniacal killer. It isn't until the detective accidentally comes across a misfiled case, that he suddenly learns that this is not the first case in which a member of his family has hunted a killer calling himself The Nemesis. The case will test the detective's mental and emotional strength as he finds himself investigating two cases, one in the present and one that occurred sixty years earlier. As the detective tries to uncover the truth, he is forced to confront family demons and will learn a horrible truth about his family and himself that will link him inexorably to the killer he is hunting.