Sixteen-year-old Josie lives her life in translation. She speaks High School, College, Friends, Boyfriends, Break-ups, and even the language of Beautiful Girls. But none of these is her native tongue--the only people who speak that are her best friend Stu and her sister Kate. So when Kate gets engaged to an epically insufferable guy, how can Josie see it as anything but the mistake of a lifetime? Kate is determined to bend Josie to her will for the wedding; Josie is determined to break Kate and her fianc? up. As battles are waged over secrets and semantics, Josie is forced to examine her feelings for the boyfriend who says he loves her, the sister she loves but doesn't always like, and the best friend who hasn't said a word--at least not in a language Josie understands.