In a world ravaged by war against the Aelor, a relentless alien force, a soldier grapples with profound loss and the weight of leadership. After the heroic sacrifice of Sir Gillihan, a revered champion who held back the Aelor to allow his comrades to retreat, Nath left shattered and questioning the meaning of his existence. Despite his efforts to protect Aina, a fellow soldier, and his closest ally, he ultimately loses her as well, plunging him into a deep despair fueled by anger and a thirst for revenge.
Determined to honor their memory, he rises through the ranks of the Iron Legion, transforming from a tactical leader into the Supreme Commander. With each victory, he becomes more resolute in his mission to defeat the Aelor and reclaim their world. After more than a century of struggle, humanity finally drives the Aelor back, only to face an even more formidable enemy upon their return, equipped with advanced technology and ruthless tactics.
In the midst of a devastating battle, Nath suffers a fatal injury, leading him to confront the reality of his losses and the futility of their fight. Just as he succumbs to his death, he faintly hears a mysterious voice urging him to continue. Miraculously, he awakens back in his younger body, at twenty-one years old, with the chance to rewrite his fate. Armed with the memories of his past and the determination to protect those he cares, he prepares to face the Aelor once more, vowing to fight not just for humanity, or for the memory of Aina and Sir Gillihan, but also for himself.