Louise has had enough of her twin sister. Caroline is beautiful. Caroline is talented. Caroline is "better." Growing up on the small island of Rass in Chesapeake Bay, Caroline seems to do nothing but take from Louise: their parents' love, Louise's chances for an education, her dreams for the future. They have spent their lives entwined -- sleeping in the same room, eating at the same table, learning in the same classroom -- and yet somehow nothing can bring them together. Louise's only hope lies in seeking a place for herself beyond the stretch of Rass's shores and her sister's shadow. What will it take for her to break free?