Award-winning author Maria V. Snyder brings readers into a world of molten magic, where storms can be captured within a glass orb and a magician's powers can remain hidden…until challenged by enemy forces. As a glassmaker and a magician-in-training, Opal Cowan understands trial by fire. Someone has sabotaged the Stormdancer clan's glass orbs, killing their most powerful magicians. The Stormdancers—particularly the mysterious and mercurial Kade—require Opal's unique talents to prevent it from happening again. But when the mission goes awry, Opal must tap into a new kind of magic. Yet the further she delves into the intrigue behind the glass and magic, the more distorted things appear. With lives hanging in the balance—including her own—Opal must control her powers…powers that could lead to disaster beyond anything she's ever known.

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 messengers which allow instant communication over vast distances have become a vital part of Sitian society. Once used solely by the Councilors and magicians, other powerful factions are now vying for control. Control of the messengers equals control of Sitia. Unfortunately that also means control of Opal. If that isn’t enough of a problem, Opal’s determination to prove blood magic is still being used is met with strong resistance. 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.

An undercover mission leads to danger, adventure and an impossible choice. After siphoning her own blood magic in the showdown at Hubal, student glass magician Opal Cowan lost her powers. Immune to the effects of magic, Opal is now an outsider looking in, spying through the glass on those with the powers she once had. Powers that make a difference in the world. Suddenly the beautiful pieces she makes begin to flash in the presence of magic and Opal learns that someone has stolen some of her blood. Finding it might let her regain her powers or discover that they're lost forever...

While trying to teach her adopted daughter, Reema, how to work with molten glass, Opal receives a letter from Master Magician Zitora Cowan requesting Opal's immediate help. Zitora resigned from the Sitian Council over two years ago to search for her lost sister, and no one has heard from her since. The letter is probably a trick, but Opal refuses to pass up the opportunity to help her mentor, who may be in genuine trouble. Good thing Opal isn't that easy to fool. With her two soldier friends Nic and Eve providing backup, the three travel to a small town in the Jewelrose Clan. But can they rescue the Master Magician without being caught in the same trap?