For most of her life, Allison Beckstrom has used magic and accepted the heavy price it exacts. But now that all magic is poisoned, it's no longer just using people-it's killing them. With Portland about to descend into chaos, Allie needs to find a way to purify the wells of tainted magic beneath the city. But the only options left to her are grim: attempt to close down magic forever, or follow her father's plan to set magic into the right hands-even though she's learned to never trust his word. Now, Allie will have to make a choice and face the darkness of her own deepest fears, before time runs out for them all…