The story describes a future world where humanity lives underground isolated in individual rooms, with all needs met by an omnipotent machine. The main characters Vashti and her son Kuno disagree on their dependence on the machine. Kuno has visited the surface and believes the machine is breaking down, while Vashti dismisses these concerns. Over time, people come to worship the machine as a deity and lose the ability to repair it. Eventually, the machine collapses, bringing an end to their civilization and way of life.