A playground sandbox unexpectedly yields the nude body of a woman covered with whip and restraint marks. The ensuing investigation leads a slightly embarrassed Grissom (William L. Petersen) and Catherine (Marg Helgenberger) to an underground fetish club. And in another case, Warrick (Gary Dourdan) and Sara (Jorja Fox) must determine if a fatal shooting occurred during or after a robbery. ~ Hal Erickson, Rovi