When oil drilling turns into rust-colored tombstones and coal warehouses turn into empty tombs, human civilization teeters on the edge of the cliff of energy exhaustion. The dawn of new energy technology has not yet penetrated the gloom, and an isolated city called "Iron City" has long been reduced to a resource arena - ration cards are the passport to survival, black market transactions hide deadly traps, and in the neighborhoods where the neon lights are extinguished, every flickering oil lamp reflects hungry eyes.
Energy engineer Su Yan tried to piece together a new energy blueprint using the remaining data, but discovered an energy black box concealed by the government during a power grid collapse accident; Lu Ran, a "current hunter" on the black market, made a living by reselling emergency batteries. His sister's mysterious death convinced him that there were human-controlled gears hidden behind the crisis. When Su Yan's laboratory was burned down by mysterious forces, Lu Ran's smuggling channels suffered a devastating blow, and two people on opposite sides of the order were forced to hold on to the same incomplete energy distribution map.
