After his father passes away, Xu Zhiqiang is left with nothing but a yard full of discarded machinery, while his second uncle and aunt take the repair shop, tractor, and family home. When his wife, Lin Shufen, suddenly goes into premature labor, he cannot even borrow the twelve yuan needed for her hospital deposit. Just when he is at his wit's end, he unexpectedly gains the ability to identify mechanical faults and determine the value of spare parts. He finds usable bearings in a pile of scrap metal and earns emergency money by repairing vehicles. From then on, he buys discarded agricultural machinery, repairs it, and resells it. With his skills and honesty, he transforms a junkyard into a thriving repair business.