The distant future, 5012.The sudden aerial invasion of Earth by < Aliens > and their creations <Machine Lifeforms>led mankind to the brink of extinction. The surviving number of humans who took refuge on the moon to organize a counterattack using <android> soldiers to recapture Earth. However, the war reaches a stalemate as the <Machine Lifeforms> continue to multiply infinitely. In turn, humanity deploys anew unit of android soldiers as an ultimate weapon: <YoRHa> Newly dispatched to Earth <2B> joins<9S>, the analyst currently stationed there, where amid their mission, they encounter a myriad of mysterious phenomena... This is the story of these lifeless <androids> and their endless fight for the sake of mankind.