When Melissa Morgan, a sexy big-city girl, moves to a small Texas town, she creates quite a stir with her beauty and promiscuous attitude.  She's 15 going on 25, and all the boys at her new school are anxious to get to know her.  But when the younger brother of a local hellraiser is brutally murdered, the town sheriff must try to solve the killings before the killer strikes again.  Along to help him is his Nancy Drew-ish daughter.  What secret will be revealed when Melissa turns SWEET SIXTEEN!??