Three years ago, the Zahryssar Empire saved the Northern Kingdom of Thalryn from absolute annihilation. In gratitude—and desperation—Duke Veyrhold of Thalryn swore a vow to the Coiled Throne: he would send a bride to the Serpent Emperor.But gratitude soon turned to fear.The ruler of Zahryssar, Zeramet Karash, Prime Alpha of a bloodline, was rumored to be a monster—the Serpent King who wiped out his own bloodline, a ruler no consort had ever survived, and a sovereign who could erase a person’s very identity.No omega stepped forward and the promise remained unfulfilled.Until Zahryssar demanded payment.“If I could save your kingdom,” the Emperor declared, “I can erase it just as easily.”With war threatening once more and innocent lives at stake, the Duke made a final choice to send his own omega daughter—only to be refused by her; she chose death over being sent to a monster.And then, his son stepped forward.Levin Veyrhold, Alpha heir of House Veyrhold—warrior, future heir of Veyrhold—offered himself instead. No Omega could survive the Serpent Emperor… but perhaps an Alpha could.In a world where vows are law, power is biology, and love is the most dangerous defiance of all, can Levin Veyrhold survive the serpent emperor?