Car repair master Chen Guoliang maintains a fleet, but his apprentice Zhao Dayong steals the contract with a half-price offer. Cutting corners and altering records, he causes multiple trucks to break down sequentially, putting an order of 4.8 million at risk of breach of contract. At a critical moment, the boss turns back to ask for help. Chen Guoliang sets only one condition: if it fails inspection, he will never sign off or hand over the vehicles. In the end, the apprentice's repair shop closes down, while Chen Guoliang, who insists on the rules, wins more clients with his genuine skills and reopens.