She was the girl of dreams, but in the twenty years apart, did she become the world's most deadly assassin? It took until prom night for Brian Eades to summon the courage to tell his best friend he loved her, but when the moment of truth arrived, Samantha Costales vanished without a trace. No note. No phone call. She didn't even show for graduation. Twenty years later Brian is a single father teaching at his alma mater when Sam returns...