In UC 0123 renewed conflict breaks out after a generation of peace in this continuation of the "Mobile Suit Gundam" anime saga. To accommodate the growing population, the Earth Federation has built new space colonies. But the Crossbone Vanguard decides to seize these cities to help establish its extraterrestrial empire. Now, reluctant hero Seabook Arno and his Gundam F91 must lead a fierce struggle for survival.