Spending the summers on her family's private island off the coast of Massachusetts with her cousins and a special boy named Gat, teenaged Cadence struggles to remember what happened during her fifteenth summer.

Told through flashbacks, best friends Jule and Imogen are orphaned outcasts who will do almost anything to attain a happy, wealthy life.

As a senior at her Seattle prep school, Ruby continues her angst-filled days and copes with the dilemmas of boyfriends, college applications, and her parents' squabbling, but comes to realize that her "deranged" persona may no longer apply.

A Seattle sixteen-year-old juggles therapy, running a school bake sale, coping with her performance artist mother, growing distant from an old friend, and conflicting feelings about her ex-boyfriend and potential new boyfriends.