The Calamity War engulfed the entirety of Earth and required the deployment of Gundams to terminate the chaos. However, as time passed, some of these machines were hidden away while others were left to decay.
Argie Mirage bears the weight of his kin's demise, resulting from a Gundam's actions, and Volco Warren is determined to revive his family's abandoned Gundam.
Their fates intertwine as one aims to eradicate a Gundam while the other yearns to resurrect it. In the midst of this, the Astaroth mecha stirs from its 300-year slumber.
