Like the colorful pieces of sea glass washed up on shore, Opal has weathered rough waters and twisting currents But instead of finding a tranquil eddy, Opal is caught in a riptide Her unique glass ers which allow instant communication over vast distances have become a vital part of Sitian society Once used solely by the Councilors andfor control Control of the ers equals control of Sitia Unfortunately that also h of a proble used isresistance The Council doubts her, her mentor doubts her, and even her family is concerned When her world is turned upside down, she begins to doubt herself In the end, Opal must decide who to believe, who to trust, and who has control--otherwise she will shatter into a million pieces and be swept out by the tide