"I wasn't demon enough to defeat my brother before. Things have changed."

As the veil begins to fall, and the demons bleed through onto the streets of Boston, Muse knows the battle is lost before it's even begun.

To make matters worse, Adam and the Institute have captured Akil at a time when the city has never needed him more. Muse believes Akil's incarceration is a ruse, because if he truly is at the mercy of the Institute, she must choose which side she'll fight for. Human or demon?

The princes are coming. Valenti, Muse's immortal half-brother, leads the charge. The Institute is not ready, the people of Boston are not prepared, but one man is. Stefan knows what it will take to beat back the netherworld. Will his demon allow him the freedom to right his wrongs?

Muse's loyalty will be tested. To save those she loves, she must give up that which she cherishes most. Her humanity.

The Mother of Destruction is about to go nuclear.