In the future, humankind has expanded and colonized other planets, but a devastating attack by the alien species, Victim, has reduced Earth's colonies to a single planet, Zion. To protect Zion, the Global Operating Agency (GOA) has established a training school to cultivate pilots for the Ingrids, five advanced fighting robots known as the Goddesses. These pilots, who possess a rare blood type, EO, and a special ability, or EX, are the last line of defense against the impending threat. Zero, Candidate 88, has arrived at GOA and, despite the risk, forms a full synch with the Ingrid Eeva-Leena, a Goddess with a reputation for being deadly to pilots. As Zero begins his pilot training, he must navigate the challenges of being an Ingrid pilot and uncover the secrets behind his unexpected synch with Eeva-Leena.