In the future interstellar era, human civilization is divided into a strict hierarchical system, and "lower humans" with talents lower than E-level are exiled to the earth-like planet "Abandoned Star" - a giant garbage disposal site full of interstellar waste. Locke, the former Earth social animal, has traveled through this time for three years, and has always been struggling to survive in the waste metal and radioactive dust as a "garbage bug". The metal ring that accompanied the time travel in his left hand showed no abnormality for three years, until a fatal crisis struck.
