Qin Shouchuan has spent twelve years working at the county grain drying center, relying solely on his experience to accurately diagnose faults in grain-drying towers. The new director purchases substandard intelligent drying equipment to pocket kickbacks and dismisses Qin as technically old-fashioned. When days of torrential rain arrive, all the flashy equipment breaks down, leaving hundreds of thousands of tons of wet grain on the verge of going moldy and threatening the entire county's annual harvest. With the grain warehouses in crisis, only the abandoned old grain station renovated by Qin Shouchuan can save the day. At this critical moment, he steps forward to turn the tide and protect everyone's livelihood.