Meet the little know and even less understood heroes of police work in Las Vegas - the forensic investigators, as they work to untangle the evidence behind the yellow police tape. LAS VEGAS, NV--Lynn Peirce, devoted wife and mother, has disappeared without a trace--but her best friends have an audio tape of her husband threatening to cut her up into little pieces. Stripper Jenna Patrick, on the other hand, has just been found--strangled to death in a private room of the club where she worked. Crime Scene Investigation director Gil Grissom and his CSI team must uncover the evidence and unravel the truths behind both shocking murders.