In the year 2031, humanity thrives until enigmatic creatures, the Hardians, emerge and threaten their peaceful existence. To combat this new threat, the N.I.D.F. is established to study the Hardians and defend against their attacks. A skilled pilot named Aiba Shu joins the battle against these beings, while renowned scientist Rurika Yuno delves into the mysteries surrounding the 'Book of a Dead Man.' As rumors swirl, the connection between this ancient tome and the Hardians becomes a focal point in the fight for humanity's survival.