Captive's Sound is still standing...but a new evil is rising.

Nadia saved the town of Captive's Sound from a fiery apocalypse and vanquished the Sorceress Elizabeth...or so she thought. But a crack into the underworld opened, and a greater evil is breaking through.

As Nadia's Steadfast, her boyfriend, Mateo, should make her magic stronger, but the curse that torments him has only intensified. And try as she might, Nadia can't break the cruel spell on her best friend, Verlaine, or stop a mysterious illness that's striking people down one by one.

Nadia must gather all her strength to protect the ones she loves. But she is more vulnerable than ever to a darker power. The One Beneath has begun to call Nadia's name, and Nadia must decide how close she's willing to get to the darkness....before she can't escape.