In the 10th year of the apocalypse, the "grey fog" swallowed 90% of humanity, and the survivors relied on "memory crystals" to gain skills. Lin Ye, a lonely mechanic, accidentally discovered that the crystal left behind by his mother contained the key to fighting the gray fog. While avoiding the pursuit of "predators" and decoding crystals, he was shocked to realize that the gray fog was actually a memory cage created by humans themselves.
