Nick and Schenke are protecting a musician who is being threatened.

Nick joins the Luminology cult to investigate the death of a city official's son. When he inexplicably breaks off contact with the department, however, Natalie infiltrates Luminology's headquarters and discovers that Nick has been brainwashed.

Highly respected parole officer, Casey Brooks, is the prime suspect in the investigation of a murdered Vietnam veteran. Nick Knight is certain he has encountered Brooks in the past and flashes back to wartime Vietnam to discover Brooks' true identity, along with the dark secret that could ruin the parole officer's career. But the investigation changes course when Nick's prime suspect nearly becomes the next victim.

When Nick efforts to stop a robbery without using his "vamp" powers causes a death, he becomes consumed with guilt. Nick's life seems to spin out of control and nothing seems as it is. Things truly become curiouser and curiouser.

When a grisly murder occurs, it complicates an undercover cop's investigation. Detective Bruce Spencer believes he knows who the murderer is, but since he has no proof, Nick is suspicious. It also doesn't help that Bruce and Tracy go way back and in Tracy's eyes he can do no wrong. When Nick witnesses Bruce's brutal behavior, he knows that nothing is as it seems, and he'd better find the murderer before he strikes again.

When a murder occurs in a haunted house, it looks like the murderer might just be ... a ghost. On top of the investigation, Nick, Natalie, and Tracy all encounter ghosts from their own past after being in the house. When another man is apparently killed by the hand of the ghostly murderer, Nick and Tracy suspect their ghost may not be so dead. While they hunt for the murderer, all of them are haunted and must find a way to come to terms with their own ghosts.

When an anonymous tip leads NIck to a "headless corpse" in the Raven, it is only the beginning of a deadly game, with vampires as the target. Nick soon discovers the ultimate target in these murders is LaCroix. Anyone and everyone who is close to LaCroix are being killed. When LaCroix reveals that the perpetrator is Divia, his daughter and master who he betrayed long ago, it becomes a race against time for Nick to find her before she comes for him or LaCroix.