Humanity digs up god weapons from archaeological tombs to fight an alien horror at the edge of the solar system. The premise alone demands you lean forward. Every episode burns through a new mythological frame, each one carrying the weight of civilizations that died thinking these things were divine, and now we're piloting them as last resorts against something older than we can comprehend. The show moves fast enough that it never stops to explain itself, which is exactly what makes it work. You're decoding an ancient language the same way the pilots are. By the end you've either caught the rhythm or you haven't, and either way you'll know if this one was made for you.

Late in the 21st century, a new power source called DG energy transforms Earth's economy and opens space to colonization. When the first expedition arrives at Pluto, it comes under attack from colossal, mysterious beings known as the Nergal. To strike back, the Earth Alliance Army forms the AG Unit, built around G's Frames: ancient robot weapons dug up at archaeological sites across the globe. Only girls with special qualities, called Ancient Girls, can pilot them. The first AG Unit takes heavy losses during the Jupiter Trojan campaign, and Unit 04's pilot, Reiu Minamiya, is listed as missing in action. Years later, her younger sister Reika joins the AG Unit, determined to find Reiu and defend Earth from the Nergal. The action sci-fi mecha story centers on friendship and deadly battles against the alien threat.