As a glassmaker and a magician-in-training, Opal Cowen understands trial by fire. Now it's time to test her mettle. 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 happening again. But when the mission goes awry, Opal must tap in to a new kind of magic as stunningly potent as it is frightening...