Zenjiro Hirano lives a quiet, haunted life, scarred by the brutal murder of his mother, Kimiko, a once-loyal special forces operative under the powerful Defenders. Harboring a deep-seated resentment against the organization, Zenjiro rejects repeated attempts to recruit him, determined to remain free of the force that tore his life apart. But fate intervenes when he encounters a battered young woman named Ruka. Though a stranger, she soon recognizes Zenjiro’s true lineage and the dark inheritance that marks him as the last descendant of Miguel, a demi-god the Defenders have long sought to control. Forced to accept a deadly ultimatum to join the Defenders, Zenjiro is bound by duty to an organization he despises, as Ruka is coerced into secretly monitoring him. Mission by mission, Zenjiro’s simmering distrust deepens, uncovering revelations about the Defenders and the long-buried truth of his family’s past. As he inches closer to his mother’s killer—his own estranged brother, Akihiro—Zenjiro’s world spirals into chaos. In a fateful confrontation, a surge of uncontrollable power erupts, leading him to a devastating act that changes his life forever. Legacy unfolds as Zenjiro wrestles with duty, vengeance, and the haunting mystery of his own identity, trapped between worlds of power and loyalty.