"CSI", the full name of "crime scene investigation team", is a group of criminal investigation professionals who use the most advanced and high-tech means to analyze materials through objective objects such as fingerprints, hair, blood, shell casings, footprints, fibers, debris, and corpse features at the crime scene, reason reasonably on the basis of "everything speaking with evidence," and finally locate the murderer. The story takes place in the cash-strapped gambling city of Las Vegas, so it involves many casinos and the vast deserts of Nevada. Members of the CSI team include Catherine Weiss (Margo Hagenberg Marg Helgenberger), a daughter of a casino tycoon, Warrick Brown (Gary Durden Gary Dourdan), a black man who used to be addicted to gambling, Nick Stokes (George Aides George Edes), and rock youth DNA appraiser Greg Sanders (Eric Szmanda). Led by seasoned Jill Grissom (William Peterson William Petersen), he fists at all the darkness in Vegas.