When Rachel, a friend from Rose's past, starts phoning her late at night, begging Rose to return to her old prep school to save her, Rose ignores her pleas until she receives word that Rachel has died. Though the police think it was a suicide-by-drowning, Rose is suspicious, and as she questions those who knew Rachel best, a sinister back story surfaces. At the same time, Rose is battling her romantic feelings for Josh, who continues to search for their missing parents and to try to uncover the truth behind the Butterfly Project. When Rose discovers a secret from Rachel's past that could be a link to Rose and Josh's parents, finding Rachel's killer becomes personal. But will the people behind the Butterfly Project find her first?