Humanity is extinct, and 2B knows this. However, her designation as 2E prohibits her from acting freely, and she must abide by her duty. On the ground, a team of S-type YoRHa models are sent to survey the area and launch their "final attack" on the machine life forms. However, all YoRHa soldiers are overcome with a virus, aside from 9S and 2B, the only two androids who hadn't yet backed up their data to The Bunker. What's more, it seems to have had an effect on the Resistance as well.