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.
(Source: NieR:Automata Ver1.1a Official USA Website)
Note: Episodes 9, 10, 11, 12 aired back-to-back on July 23, 2023.