Chen Jianguo, an experienced auto mechanic, unexpectedly returns to life in 1990, inhabiting the body of a gambling addict despised by everyone in the village. He has stolen his daughter's medicine money to gamble, accumulating a debt of 700 yuan. If he cannot repay it within three days, he will lose his ancestral home. His wife, Lin Xiulan, has lost all faith in him, while his paternal cousin secretly covets their land, and Ma Debiao, a mechanic in town, repeatedly makes things difficult for him. Relying on his exceptional repair skills, Chen Jianguo begins collecting discarded household appliances and old bicycles, refurbishing and selling them. He establishes clear rules: every transaction must be properly recorded, and no payment is charged for repairs that fail.