Year 2194 F6, mankind lived in a very different world. It is the 6th Five-year Era. Man and machine has blurred. Everyone has a wearable glasses that is embedded with a micro-processor and is a face- features reader.

With a look, everyone is identified. Unless done by sophisticated surgeons, one need not bother to disguise oneself, the technology can pick up the nuances. Anyway, it is already the sixth cycle, anyone who disguised themselves successfully and let themselves appear as "errors", or "No available data" fared far worse than the "Decimals"

"Decimals" are the lowest social class. They have low productivity rate, or due to the fact that they were in jails or jobless for a considerable period of time, their "F" value as measured in the 5 year time cycle, will be very low. In fact, these Decimals, would often mocked as Zeros Heros, but as with every hypocritical ......