Selene is the Hellhound, a powerful and ruthless descendant of the Greek gods. She is bound by tradition and tied by bloodlines to lead her people against the mortals. Although she is arranged to marry Nathanial, she falls for Demetrius, the self-professed Black Angel, and things take a bitter twist. When she stumbles across the corpses of her father and Nathanial, all eyes move in on Demetrius. Selene must take the assignment to hunt down her accused lover. Facing the untrustworthy cerebral chamber, powerful shape-shifting sentinels, superhuman archers, and a deceitful Council, the Hellhound must work quickly to uncover the truth before she is forced to annihilate her lover.