After crime scene unit investigator Daisy Chao is found murdered in her apartment, Detectives Lupo and Bernard suspect her fiance, Jim Anderson , may not be telling the whole truth about his involvement with the murder. When young journalist Emma Kim is attacked by a cab driver, DNA found at both crime scenes seems to implicate the same man for the attacks. The investigators become personally involved with the case as Detective Lupo gets close with Emma, and ethical questions arise, which puts Detective Cyrus Lupo's career on the line.