Someone is killing a number of homeless people and draining their blood. Then a museum guard is killed the same way and a special artifact is stolen, a Mayan cup that Nick believes can help him become mortal again. Nick suspects that his old mentor Lacroix is in town and behind the murders. Forced into a partnership with the unbearable Detective Schanke, Nick has to face both Lacroix and the Homeless Killer while trying to protect his friends.

Another serial killer, this time preying on young women who all attend the same church. In order to catch him, Nick must try to overcome his fear and loathing of the Church and its symbols. Meanwhile, flashbacks to 15th Century France show Nick's encounter with a young peasant girl doomed to become a martyr when her claims that God spoke to her result in the Church branding her as a heretic and condemning her to burn at the stake. Nick offers her his version of immortality, but she refuses in favor of her own belief in life after death.

A young woman dies, and all evidence points to suicide. Nick, however, has a gut feeling that it was murder, but seems unable to prove it. Added to his stack of unsolved crimes, it makes Nick question his own feelings of self-worth, especially after hearing about another, real suicide: that of one of his "old friends". Nick must search through his memories of their relationship of centuries past to determine why she killed herself, and why he shouldn't.

Someone is killing a number of homeless people and draining their blood. Then a museum guard is killed the same way and a special artifact is stolen, a Mayan cup that Nick believes can help him become mortal again. Nick suspects that his old mentor Lacroix is in town and behind the murders. Forced into a partnership with the unbearable Detective Schanke, Nick has to face both Lacroix and the Homeless Killer while trying to protect his friends.

A beautiful young woman is able to exert an almost supernatural control over men, driving them to commit criminal acts for her amusement. Nick manages to catch up with her, but will his own powers help prevent him from also falling under her spell?

The wife and daughter of a well-known philanthropist are kidnapped and held for ransom, and psychic Denise Fort is brought in help Nick and Schanke with the case. Her powers are genuine, and therein lies the problem: she keeps picking up flashes of Nick's "other life", and Nick feels torn about whether or not to reveal himself to her, since she thinks it's a sign that she's having a breakdown. Nick's recollections of a similar situation in Puritan New England make him determined that Denise won't share th e fate of his mortal friend from that time.

Nick's feelings of responsibility for the death of a man he was supposed to protect in a "sting" operation causes him to lie about actually seeing the murderer pull the trigger. In addition to the problem of having to appear in court to testify in broad daylight, Nick's desire to see justice done struggles with his conscience. He calls up memories of an incident from the past in which a woman lies in court, condemning to death a man Nick knows to be innocent, since he saw his fellow vampire Janette commit the crime.

A woman targetted in a mob hit in Chinatown escapes, but in critical condition. Nick must find her before the mobsters do, but he gets no help or trust from an ancient acupuncturist who is hiding and caring for the victim, and who recognizes Nick as the monster who killed his mother 75 years ago.

Natalie's brother Richard is shot at the police station. When it's apparent he's going to die, Natalie urges a reluctant Nick to bring Richard over as he did a leper centuries ago. Is this a second chance for Richard and his family, or will history repeat itself?

Someone's calling CTOK radio's on-air psychiatrist and murdering women on the air. Dr. Noble comes to Nick's aid -- to Stonetree's dismay -- while Schanke searches through psychiatric records. Noble thinks the killer is acting out a murderous fantasy -- one that may involve her.

Schanke's old partner is gunned down in the street. The bad guys make it clear Don is next. Jeanette lets Nick hide Schanke at The Raven because his predicament reminds them of when Nick, Jeanette, and Lacroix were hunted- only this time it appears to be an inside job.

Inspector Tony Fiore's wife confesses to shooting her lover in self-defense. Case closed?

A man is killed in an apparent mob hit. While the investigation is underway, the only witness, a young girl named Lisa, is left in Nick's protective custody. This duty reminds Nick of a boy he and his Old Friends cared for in World War II England and the ramifications of his immortality and sterility.

A journalist covering the mayoral election is electrocuted in his hotel room. Later his girlfriend is found dead too. It appears one of the candidates may be involved in a sex scandal. Can Nick find out who committed these murders without engaging in a witchhunt? Dirty politics and mudslinging gets Nick thinking about when he was Professor Nicholas Girard (Chicago, 1954) -- and on trial before the HUAC on charges of being a Communist.

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

It's Natalie's birthday again, which gets her and Nick thinking about another one of her birthdays- the day they met. Now she's met someone else- and Nick's jealousy is showing. Meanwhile a killer is murdering his dates.

Being the subject of a COPS-like television show reminds Nick of his first exposure to the camera during the US Civil War. Will modern technology finally reveal the vampires' secret?

Nick goes undercover to investigate the murders of members of The Twelve Steps, a support group for addicts. Can his sponsor help him with his addiction, or is she out to kill him too?

Nick investigates three woman who are member of the Spa Experience. They're all young, beautiful, and have murderous tendencies, but do they share something more than skin deep?

The investigation into Stonetree's recent shooting of a perp is keeping him up nights. Meanwhile Nick confronts a ghost of his own -- one that's about 300 years older.

During a hostage situation at the police station, Nick recalls his life in East Berlin (as the American Nick Thomas), where he helped another family in crisis while they helped him search for the Abarat, an ancient book of miracles that may contain a cure for vampirism.

After a model missing for four months is found dead under mysterious circumstances, another model disappears who bears a striking a resemblance to a dancer Nick fell for a long time ago

While investigating a series of bizarre murders, Nick discovers that an ancient evil from his past is behind the crimes. LaCroix, his former vampire master, has returned to the city in search of Nick, his one-time pupil The murders, coldly orchestrated by LaCroix, threaten to uncover Nick's sinister secret when he is arrested as the prime suspect. With the help of his partner, Don Schanke, and the department pathologist, Natalie Lambert, the only mortal who knows his true identity, Knight escapes. Now an outlaw, he must track down the killer and find LaCroix before he is forced to give up his dream of regaining his mortality.

Jannette turns to Nick for help when Julie Beamer, a young "lady of the evening" whom she has befriended, is murdererd. However, Nick finds his hands tied when there isn't enough evidence to hold the prime suspect. Once a working girl herself, Jannette is outraged by the lack of "justice" and seeks to quench her thirst for blood when she learns the killer may have been Mason, her friend's pimp. When Mason and a fellow cop turn up dead, Nick traces the murders to Celeste Morgan, a seemingly innocent girl trapped in a life of prostitution.

Life imitates fiction when Emily Weiss, the best-selling author of a series of vampire novels, is attacked by a crazed fan. Her works are amazingly true to life, leading Nick to believe that she may know more about the vampire community than she says. LaCroix, the leader of the community, sees her as a threat and declares that she must die and Nick must carry out the decree. Nick, however, finds that he is falling in love with this woman. She is the only mortal capable of understanding what it is like to live in eternal darkness, and she would go willingly into his waiting arms if asked. The time has come for the truth and the fiction to become one, and her fate rests in Nick's hands.