In 2177 AD, the "Sky Dome Project" went out of control, causing the nanomachine cluster "entropy dust" to swallow the world. The highly developed technological civilization collapsed instantly, and the world became a wasteland ruled by mechanical debris and out-of-control programs. Ling Radon, the young researcher who participated in creating the disaster, carried the key "zero entropy code" fragments that can calm the "entropy dust". During his escape, he met Xiya, a mysterious girl with the power of sonic resonance, and "Iron Arm" Argus, a mechanical prosthetic man who controls the energy core of the old world. Together, they shuttled through strange areas such as the "Information Cemetery" transformed from an abandoned data center and the "Mercury City" flooded by liquid metal. Not only did they have to avoid the "Data Ghost" who lived by harvesting human consciousness and the Mechanical Order who worshiped "Entropy Dust" as their god, they also needed to uncover the shady human nature behind the "Sky Dome Project". As the "zero entropy code" is gradually pieced together, they discover that the so-called doomsday may not be the end, but a civilization experiment that spans a hundred years. The code in Ling Radon's hand is not only the key to saving the world, but also the lock that unlocks the deeper mysteries of the universe.
