When Clio conned her way into the Underworld, her job was to steal magic that could protect her homeland. Instead, she escaped with the rebel son of a notorious spell weaver family. And in the process, she exposed his most calamitous spell, putting her people-and all magic-in peril. Now she and Lyre face two impossible feats: recover his creation, and do it before his family catches up to them. But when the spell is unleashed with devastating results, caution is no longer an option. Clio and Lyre's only chance lies in combining their strength, but to make it out alive, they'll need magic more dangerous than they've ever wielded before. And if they fail, the realms will pay the price.