To save his dying sister, merman prince Lioren returns to the sunless Empire of Eternal Night—only to be bound by an unbreakable obsidian ring and forced into marriage with Crown Prince Kael, a feared royal heir cursed by uncontrollable black flames.
The palace wants Lioren for his bloodline. The deep-sea court sees him as a political offering. And Kael, whose curse can only be calmed by Lioren’s tidal power, refuses to let him leave. But when a dangerous resonance between them leaves Lioren carrying an impossible heir, their cold contract becomes a battle over his body, his freedom, and the future of two kingdoms.
As nobles plot to seize the unborn child and old wounds threaten to tear them apart, Lioren begins to wonder whether Kael truly loves him—or only needs the power inside him. Then the baby awakens an ancient prophecy promising the end of Eternal Night.
But if dawn finally comes, who will survive what rises with it?
