Xu Shoucheng, a mechanic, spends his entire savings to buy an old truck-mounted crane and a specialized lifting frame that are on the verge of being scrapped. While the factory blindly pursues new equipment, a foreign trade order runs into an installation deadlock in the old workshop. Xu steps forward, relying on his superb precision control skills and the unique strengths of the old crane to complete the highly precise equipment installation perfectly and save the factory from a breach-of-contract crisis.