Out-of-control nanorobots have swept the world, turning into a "gray fog" that blocks the sky and the sun, decomposing organic matter and metals indiscriminately, and the skyscrapers of human civilization have collapsed into rubble. The survivors huddled behind the "anti-nano barrier" and relied on old-era materials to survive. {Reynold} was once a core member of the research and development team of nanorobots. He took the blame for an experiment that went out of control and lived in seclusion. He was haunted by guilt all day long. A sudden surge in gray fog concentration tore apart the camp's walls, and the nano-worm swarm was gradually encroaching on the last remaining place of survival. In order to save his compatriots, Renault suppressed his guilt and determined to develop a "nano neutralizer". He led the team into the foggiest old-era science and technology park, and faced the "nano aberrations" that fused metal and flesh. He was also shocked to find that a mysterious force was secretly collecting out-of-control nanorobots in an attempt to turn them into the ultimate weapon. Renault must race against time to find the core materials before the camp is destroyed, dismantle the conspiracy of the mysterious forces, dispel the gray fog, and restart the earth's vitality. He must repair the core of time and space, save thousands of worlds, and find his lost sister at the same time.
