A cikin AG 101 (shekara ta 101 na kalandar Advanced Generation) wani abu mai ban mamaki da aka sani kawai da "UE", ko "maƙiyi da ba a sani ba", yana kai hari da lalata sararin samaniyar Mala'ikan. Wannan mummunan harin ya zama sananne a matsayin "Ranar da Mala'ikan ya fadi", kuma alama ce ta farkon yakin bil'adama don rayuwa. Jerin ya fara ne a cikin AG 108 lokacin da UE ta kai hari a sararin samaniyar Ovan, inda Flit Asuno ke rayuwa a yanzu bayan ya tsere wa Mala'ikan mallaka kafin halakar. Mahaifiyar Flit jim kadan kafin UE ta kashe ta, ta ba wa ɗanta wani abu mai suna "AGE Device". A cikinsa ya gano zane-zanen makami mai ƙarfi daga zamanin da—Almasihu na dā mai suna “Gundam”.
Daga waɗannan zane-zane, Flit yana ciyar da shekaru masu zuwa yana karatun injiniyanci a cibiyar Tarayyar Duniya akan sararin samaniyar Nora da kuma tsara Gundam AGE-1. Shekaru bakwai bayan haka, a cikin AG 115, Flit ya kammala Gundam AGE-1 Al'ada, kamar yadda UE harin Nora, kuma yayi amfani da shi don taimakawa ma'aikatan jirgin ruwa na Federationungiyar "Diva" wajen kwashe 'yan ƙasa na mulkin mallaka kafin a lalata shi. Ya ƙudiri aniyar kawo yaƙi ga EU don lalata gidansa sau biyu, Flit ya yarda ya yi aiki a tawagar Diva ta hannu da ke tukin Gundam. Bayan samun isassun bayanai da ikon soja don kafa hanyar aiki, ma'aikatan Diva da abokansu sun kaddamar da wani hari mai nasara wanda ya lalata sansanin sirri na UE a cikin Asteroid Ambat. A can suka fahimci cewa UE a zahiri zuriyar wani aikin ɗan adam ne da ake kyautata zaton ya gaza, wanda aka aiko don yin mulkin mallaka a duniyar Mars, wanda Tarayyar Duniya ta bar su a mutu, waɗanda suka kafa al'ummarsu a jajayen duniya da ake kira Veigan.
