Z.O.E. 2167 Idolo is set a few years before the events of the series Z.O.E Dolores, i, and focuses on the "Deimos Incident," a terrorist act carried out by Mars revolutionaries. BAHRAM army pilots Radium and Viola are the top performers in their class, and as such, they have been selected to lead testing on a new type of weapon; Mars hopes this weapon will free them from the tyranny of the UNSF (United Nations Space Force). This new technology, called the "Orbital Frame," is powered by an extremely rare and potent energy source known as Metatron ore.