Alone for a millennium, since a human murdered her beloved consort, Ashra, the immortal icrathari queen, rules over Aeternae Noctis, the domed city of eternal night. Her loneliness appears to be at an end when her consort's soul is reborn in a human, Jaden Hunter, but their reunion will not be easy.

Icrathari are born, not made. If Ashra infuses Jaden with her immortal blood, he will be a vampire, a lesser creature of the night, a blood-drinker rather than a soul-drinker.

Furthermore, Jaden is sworn to protect his half-sister, five-year-old Khiarra. She is the child of prophecy, destined to end the eternal night and the dominion of the Night Terrors—the icrathari and the vampires.

As Ashra struggles to sustain her crumbling kingdom in the face of enemies without and treachery within, Jaden fights to defend his sister and unravel a greater mystery: what is the city of eternal night, and how did it come to be?