It is the Regild Century, long after the era of space settlement and space wars. The people of this new era enjoy a fleeting peace, thanks to energy supplied via a sacred space elevator. Bellri Zenam, a cadet in the Capital Guard which protects this tower, ends up in battle against pirates who attack during a training exercise. Among them is Aida Surugan, whose mobile suit G-Self closely resembles the legendary Gundam. Their adventures will bring Bellri and Aida close to the mysteries of the world, and of their births.