In Tango City, humans and human-shaped robots called cybersabers coexist more or less peacefully. Zafnar Farfetched is no exception, a human with a mundane job and a quiet life. His life changes, however, when he finds his long-lost childhood friend Lemonlime, one of the first cybersabers ever built. Suddenly, everything changes. Someone wants him dead, and to replace all of humanity with identical cybersabers that are programmed to obey without question. In order to stop them, he'll have to delve into the past, to the very creation of the cybersabers and their purpose.