Rebecca Bennett, the estranged daughter of a well-to-do Las Vegas businessman, is hounding Captain Jim Brass to reopen the investigation into the death of her mother Rita, alleging that - despite appearances to the contrary - her avaricious stepfather had a hand in her mother's untimely end. But noone is prepared for the mystery that Gil Grissom, Sara Sidle and Nick Stokes uncover. Their investigation is inconclusive - because the disinterred body is not that of Rita Bennett. Meanwhile, at the Sunny Day Continuing Care Facility, Catherine Willows and Warrick Brown are looking into the sudden death of Vivian Elliot - which may not be the result of natural causes.