Behind the facade of a stately Boston brownstone, humanity's last defenses are being marshaled. Called to action by the enigmatic, brilliant man known only as Mr. Doyle, they hail from all planes of existence and are born from an array of supernatural and otherworldly backgrounds and bloodlines. But as the group struggles to come to terms with their shadowy pasts, personal demons, and conflicting loyalties, their greatest challenge awaits them.

Together, they will confront the minions of utter darkness, who have already begun their quest to resurrect the most malevolent of the fallen angels--whose wrath against mankind knows no bounds . . .