For generations, the Southern Sun-Realm has lived in the golden warmth of the Starwind lineage. But as the sun begins to dim and the ancient "Void" stir in the corners of the world, a terrifying prophecy emerges: Only a Spirit born of Sun and tempered by Frost can hold back the Great Dark. Elissa Starwind, the youngest Princess of the South, is seen by her court as a failure. Unlike her siblings, whose light is a roaring furnace, Elissa's "White Flame" is a mere flicker—pale, cold, and seemingly useless. When the prophecy demands a union between the Sun and the North, her father sees an opportunity to discard his "weakest" child. Elissa is sold as a Tithe to the Witch-Kingdom of Aethelgard, wed by blood-contract to the most feared predator in the frost-lands: Alistair D'Valtheron.
Alistair is a Pure-blooded Vampire Prince, a being of refined hunger with crystalline, incandescent blue eyes that prove his mastery over his own monstrous nature.
As time passes Alistair discovers that Elissa's "weakness" is actually a different kind of power: a purity that doesn't just burn shadows, but heals the very fabric of reality.
As the Moon moves to smother the Sun, the "Weakest Princess" must become the North's greatest weapon. To save her brother, her husband, and her kingdom, Elissa Starwind must decide if she will remain a flickering candle or become the bonfire that consumes the darkness—even if it means losing her humanity in the process.