Zhao Tiezhu retired from the army and returned to the village. He just wanted to farm and provide for his retirement. The village tyrant Qian Dabiao took a fancy to his old yard and wanted to demolish it. Zhao Tiezhu refused, so Qian Dabiao called an excavator to bulldoze his house overnight. Zhao Tiezhu got into the dilapidated warehouse left by his grandfather and tinkered all night. The next morning, Qian Dabiao's excavator was overturned in the ditch, and there was a note on the cockpit door: If you touch my house again, your building will be excavated next time. The whole village thought it was haunted, except Zhao Tiezhu, who was squatting on the field ridge, gnawing on steamed buns, looking at the mecha disguised as a tractor in the warehouse, and grinning.