Qi Zhongshan is a veteran repair craftsman who personally helped his apprentice, Zhao Qi, establish Aurora Appliance City. Unexpectedly, Zhao Qi becomes consumed by greed, sells inferior products as premium goods, repays his master's kindness with betrayal by firing him, and joins forces with competitors to blacklist him across the internet. With nowhere else to turn, Qi Zhongshan sets up a street stall in an urban village to make ends meet. Drawing on his exceptionally refined repair skills, he helps ordinary people solve their problems at low prices and quickly becomes a neighborhood sensation, dealing a serious blow to Aurora Appliance City's business. Zhao Qi resorts to malicious reports, monopolizing supplies, and sending undercover spies to steal his techniques, but Qi Zhongshan effortlessly foils every scheme. The old craftsman turns scrap into treasure by dismantling discontinued components and repairs the city's core server entirely by touch, saving the city's entire transportation network.