Josie DuPuy finds her calling as a cop and becomes a homicide detective, only to lose the job when she closely survives a shooting that changes her life.
Not satisfied sitting at home every day, like so many young women are not in today's world, she decides to go back to work. After she finds a job in the Maricopa County Forensic Center, her job leads her to become involved in an outbreak of the Hanta Virus.
The outbreak is not only extremely difficult to deal with for Josie, but for others she meets as well. It becomes a nationwide menace, then infects not only Josie but the CDC doctor she's working with too.