The "Glass Sky" incident broke out in 2077: the world was suddenly enveloped by a translucent glass-like film, solar radiation was distorted, electronic equipment collectively failed, and the information age civilization that mankind was proud of collapsed overnight. What's even more frightening is that the "shadow erosion energy" seeping out of the sky has spawned "shadow erosion beasts" of various shapes, which feed on human emotions and turn cities into ruins. In the fault line of civilization, mankind has discovered the "craftsman inheritance" that has been dormant for thousands of years - the extraordinary system formed by ancient craftsmen integrating fragments of alien technology into traditional techniques, which has become the only hope to fight against shadow erosion...
