Rebecca Bennett, the estranged stepdaughter of a well-to-do Las Vegas businessman, is hounding the Las Vegas Police Department to reopen the investigation into her mother Rita's death - alleging that, despite appearances to the contrary, Rebecca's greedy stepfather actually played a hand in Rita Bennett's untimely end. But no one is prepared for the news that CSI's Gil Grissom, Sara Sidle, and Nick Stokes report - their investigation is inconclusive - because the disinterred deceased is not Rita Bennett. Meanwhile, at the Sunny Day Continuing Care Facility, Catherine Willows and Warrick Brown must investigate the sudden demise of Vivian Elliot - a patient whose death may be the result of unnatural causes...