Macey McAllister, "Niner" to her classmates, is missing a lot of things--her thumb, her birth parents, her history--and now her adoptive mother had disappeared as well. So one morning when Macy finds a locket on her front lawn, she is convinced that it is a sign, something placed there just for her. But when others seem to want the locket as well, Macey, her sister, Deena, and their friends are unwittingly drawn into the middle of a frightening and...