Las Vegas... With its bright neon lights, and hundreds of gambling clubs and casinos, it attracts more and more people. But not all of them turn out to be respectable citizens. A huge flow of people often hide criminals of all stripes. They are convinced that their evil deeds will go unnoticed. But they are very mistaken because in the city works a tireless team of police C.S.I. When the investigation reaches a deadlock, a group of superprofessional criminalists led by Captain Grissom comes into play.