After a catastrophe, world population has dramatically shrunk and people have to live in an underground city. Gradually, the extrenal environment improves and some of "e;the Buried"e; move outside, but, as a result, they become sterile. That is why they develop a plan to forced the Buried to put their children up for adoption.Meanwhile, the resistance tries to rebel against the Government.Ana, a nineteen-year-old buried girl, has the opportunity to help the resistance, although she will have to fight her mixed feelings to achieve it.