Taking place in a modern era, "Ring of Gundam" follows the events that happen much later than the One-Year War showcased in the Mobile Suit Gundam series. The tale takes place in a realm where a monumental ring with a diameter of 600 kilometers levitates in lunar orbit. Amidst this backdrop, Eiji, a soldier working for the Earth Federation Forces, stumbles upon an artifact known as the "Beauty Memory" while digging through a vast rock formation situated high above the Earth's surface.