After the defeat of Germany in the Third World War of 2073, which resulted in the nuclear devastation of almost half of Europe, Germany concealed its remaining weapons in a secret bunker. Within the confines of this bunker lies the most perilous weapon of all—EINS-70, also known as AngLu. AngLu is a robot developed by Germany during the war. Upon awakening, she finds herself unaware of her purpose, with her sole recollection being that she is a weapon and the memory of her dear friend, Jaeger.