Hansa, Umber, and Cadmia have managed to fight their way out of the Abyss and return to Kavet, bringing with them the long-imprisoned Terre Verte.
Prince Verte is determined to return Kavet to its former magical strength and restore the royal reign of the Terre family. He has the ability; his stay in the Abyss has left him abundantly powerful. But it has also left him dangerously unstable.
But when Naples, once the strongest Abyssumancer in Kavet—and former ally of Verte—also returns from the Abyss, Hansa and the others realize it is not Verte they need to be concerned with. For the Abyssi and the Numini are engaged in their own grand war, one that is pouring across the veils of the realms. And if the magic-users cannot come together to stop them, the fabric of the mortal world will be destroyed, taking all of them with it.