For hundreds of years, people have lived in deep caves, in constant fear of earthquakes and landslides. In one of these underground villages lives a boy Simon and his spiritual mentor, Kamina’s boyfriend. Kamina believes that there is another world above, without walls and ceilings, his dream is to get there. One day they find a strange mechanism, similar to the head of a robot, and decide to take a chance. Once on the surface, the guys understand that life is not easy here. After all, “above” with might and main there is a campaign of beastmen to destroy recalcitrant humanity. Will Simon be able to prevent genocide and what dangers or loyal comrades await him in this war?