Lu Fei, a young man returning to his hometown, brings an agricultural drone back to start a business, determined to promote smart farming. However, the villagers mock him, calling it a useless "iron lump." Facing resistance and skepticism from Zhao Daqiang, a major grain farmer, Lu Fei refuses to give up. Through patient explanations and free demonstrations, he proves the power of technology. When a sudden torrential downpour strikes, traditional manual pesticide spraying cannot keep up. Racing against time, Lu Fei pilots his drone and efficiently completes the spraying across the entire village, successfully saving the crops. In the end, the villagers are thoroughly convinced, and the whole village establishes a smart agriculture cooperative, embarking together on the road to prosperity through technology.