Criminalist Third Class Siobhan Connelly of the Las Vegas Crime Lab has processed too many crime scenes involving young African-American prostitutes. She believes a serial killer is responsible for the women's deaths, and her investigation into the murders is beginning to take its toll on her. Complicating matters is her boss, Dr. John Garnett, and her friend, Detective Daniel Novak. Both men worry that she's becoming too emotionally involved in the case, and each of them wants to protect the beautiful, young criminalist on and off the job.