In the grim expanse of the Bronze Kingdom, Alatar Saliton dubbed the Demon Eater, emerges from the ashes of a village ravaged by demons and witches. His existence is a fusion of vengeance and an ill-fated ritual that bound his essence with that of Vorgrimm, the First Ancient Demon King. Driven by a thirst for retribution, Alatar embarks on a relentless quest to eradicate every demon and those allied with them. Amidst this darkness, fate intertwines his journey with Mira, the youngest Princess of the Diamond Kingdom, betrayed and sold into demonic enslavement by her kin. Rescued by Alatar, she, too seeks vengeance, embracing the shadows that envelop his mission. As Alatar navigates the treacherous paths of this dark fantasy realm, the line between his humanity and the voracious demon within blurs. Will his pursuit of vengeance consume his soul, or will he triumph against the forces that seek to claim him, risking both his life and essence in the relentless pursuit of justice?