Veteran mechanic Zhou Tiesheng adheres to his original intention of repairing cars, establishing himself through skill and integrity. His son Zhou Zhiqiang, eager for quick profits, cuts corners to snap up business, causing a maintenance accident and paying a heavy price. After going through the turmoil, Zhou Zhiqiang wakes up to reality. The story interprets the principle that integrity is the foundation of the handicraft industry, and tells the simple truth that a shop can be competed for, but people's hearts can only be won with sincerity.