The world has been destroyed by a global epidemic. Humanity is on the brink of extinction. Only a few survived. Meanwhile, in one of the bunkers, a highly developed robot "Mother" is raising a girl from an embryo. The child has never seen other people and the surface of the Earth. Each new day of her almost completely repeats the previous one. But one day her calm and peaceful world collapses when a woman breaks through to them from the surface, who tells her that there are still other survivors.