On the world of Abel, humans and androids live side by side. One day a shadowy hitchhiker aboard a freight ship attempts to infiltrate the planet, yet is caught by Apollo (Hayato Ichihara), a humanoid robot; and Mikaru (Aya Ueto), a person who resembles machinery. The intruder carries a data chip brimming with the newest stealth firmware, the enigmatic "Cipher" operating system. Apollo snatches the chip for amusement, unaware of the danger it holds. Soon his behavior turns odd, while Mikaru remains oblivious to the underlying cause. What exactly is Cipher? Which secrets does it conceal? Together Apollo and Mikaru will piece together a puzzle that spans history, the present, and tomorrow to uncover its truth. Investigation will reveal guardians deeply protecting the city's legacy.
