The war never ends because both sides stop asking why it matters. 2B and 9S are soldiers programmed to fight machines that are learning to feel, and the show quietly dismantles everything you think you understand about which side deserves to survive. By the time it breaks you, you'll realize the real enemy was always the question nobody wanted to ask: what makes a life worth saving if it can be copied, deleted, or replaced tomorrow.

In the year 5012, androids 2B and 9S fight a war that may never end. Invaded by aliens and their Machine Lifeforms, the surviving humans have fled to the moon, while the machines keep multiplying on Earth and the conflict has stalled. Humanity's answer is YoRHa, a new force of android soldiers sent down to retake the planet. Newly arrived, the combat android 2B teams up with 9S, an analyst already stationed on the surface. Their missions bring a string of mysterious phenomena, and as the fighting rages on, the YoRHa begin to catch glimpses of the truth behind the war. Faced with that reality, 2B starts to question her own existence and how much she must give up for mankind. The result is a psychological sci-fi action drama about lifeless soldiers locked in an endless fight.