When Gabrielle Garrett fails to make it home for a Las Vegas Christmas Eve reunion with her father and three sisters, her family is very concerned; soon thereafter, her dead body is found in Lake Mead. Ruled a suicide by the coroner, and with their father Dylan in the the hospital suffering a heart attack upon learning of his daughter's death, the three Garrett sisters: Katie, a TV reporter, Brenda, a pop singer and Jessica, a computer graphics designer embark on a journey to clear their sister's name and solve what they believe to be her murder.