Set a few years before the events of Z.O.E Dolores,i, this single-episode OVA builds toward the Deimos Incident, a terrorist act carried out by Mars revolutionaries. Radium and Viola, the top pilots of the BAHRAM army, are picked to lead trials of a new weapon called the Orbital Frame. It draws its power from metatron ore, a scarce and potent energy source. Mars is counting on these machines to free it from the oppressive rule of the United Nations Space Force. The story covers the events that lead up to the incident and the incident itself, mixing mecha action and science fiction with drama and romance.