Sheriff Mobley (Glenn Morshower) is among the guests at a fundraiser in a lavish Las Vegas mansion when a beautiful young woman is found dead in the swimming pool. The main suspects are the hosts, a young couple (Shawn Christian, Elizabeth Lackey) who are house-sitting for the mansion's owners. As Grissom (William L. Petersen) and Catherine (Marg Helgenberger) try to track down those mysteriously absent owners, Warrick (Gary Dourdan) investigates an apparent mob hit in a hotel's glass elevator. ~ Hal Erickson, Rovi