Repairman Wen Yan senses that Lu Zhenhai is like a returnee, racing against an early-arriving extreme heat. 50 degrees is just an appetizer; 7 days later, water becomes poison, and the grid will collapse. Wen Yan buys an abandoned civil air defense cold storage, uses scrap iron to piece together a deep well water-cooling system, but is forced into symbiosis with combat rank number one Shen Yan. Water cut off, ambush, main breaker locked, yet the third round of the red day suddenly arrives early: target 90 degrees. The low-temperature core is snatched, and the cold storage has only 6 hours left. Even ice cubes will melt; what on earth makes her let the entire old district cool down again? When the system treats the earth like an air fryer, can a maintenance worker with a combat power of only 19 win against the returnee?