Entropy Shift Between Two Worlds: Doomsday Tech and a Modern Grain Depot

Supermarket stock clerk Han Xiaoyu accidentally discovers that a stone in his rented room can open a rift to a red-mist apocalypse. There, he meets Shitou, a child struggling to survive, and encounters the “Steel Dome,” cut off from the world by towering walls. To bring Shitou the strawberry cake he promised, Han Xiaoyu transmigrates between the two worlds again and again, gradually becoming entangled in the apocalypse’s secrets. The Steel Dome’s energy core comes from the same source as the stone in his hand, and an iron box left behind by Lao Zheng, the supermarket warehouse manager, holds the truth about the two worlds’ connection twenty years ago.

Working with Dr. Chen Lan of the Steel Dome, Han Xiaoyu uses near-expiry food, vitamins, and vacuum-packing technology from the modern world to help apocalypse survivors. He also gradually uncovers the cause of the red mist and the dark secret behind the gene-stabilizing serum. He must balance the rules of survival in both worlds and protect those close to him: Shitou in the apocalypse and his younger sister Xiaoyu in the modern world. At the same time, he faces threats from factions such as Scarface and the danger of the unstable rift between the two worlds. In the end, as an ordinary person, he uses the most commonplace “kindness toward near-expiry goods” from his supermarket to build a lifeline across the ruins and neon lights, bridging despair and finding his own reason to survive.