Celia, the illegitimate daughter of a noble, endures endless humiliation. Poisoned into muteness by her stepmother, she is sacrificed to the abyss and delivered into the hands of the brutal demon dragon, Draco. Everyone fears the dragon who devours humans, yet he does not kill her. Instead, he makes a pact with her: bear his heir, and he will grant her the power to take revenge. Forced to agree in order to survive, Celia later discovers the truth. The so-called heir pact was nothing more than a scheme that the lonely dragon had plotted for centuries. She is the only one who can tame the bloodthirsty power within him, and she is his fated mate.With the demon dragon's power, she takes her revenge and reclaims everything. But the child growing within her carries both human and demon blood, breaking the laws of the world and drawing the full wrath of the Olympian gods upon them.