The world is being attacked by the mysterious "Victims" — giant space monsters sent to destroy Zion and all its inhabitants. Zion's only defense are the five Goddesses — sentient mechas, each bonded to her own pilot and repairer. With a high pilot turnover, it's up to the Goddess Academy (GOA) to train young candidates with gifted abilities (called EX) to one day become a pilot of a Goddess. Candidate #88- Zero has just joined the GOA and deep, dark mysteries and secrets soon unfold between Zero, the pilots & candidates, and the Goddess Ingrid as the Victims press their attack.