Lin Ye, an 18-year-old auto mechanic apprentice, accidentally activated a military exoskeleton picked up from a scrapyard during a strange rain of fallen leaves. He discovered that this exoskeleton could not only resist strange attacks, but also evolve by swallowing strange energy. As the strange invasion intensified, he grew step by step from a low-level young man to a mechanical god who led mankind to resist. The whole process was full of strange brain circuits, outrageous operations, and intense excitement.