Imagine a spell that can age you a lifetime in heartbeats, turn loved ones into enemies, and set demons upon your soul ... and imagine having to use it to save the kingdom.

Battle-tested Augum, Bridget, and Leera prepare for a final confrontation with the increasingly vicious Lord of the Legion. To face him, they must master a hopelessly complex spell they can only learn from their legendary mentor, Anna Atticus Stone.

But with a kingdom hurtling toward annihilation, Anna Stone's health failing, and relationships crumbling under the stress, the trio face the most painful decisions of their lives. For the slim chance of victory, they'll risk everything on a daring plan—one that, whether it triumphs or fails, will exact a terrible price.