Medical student Xu Ning returns to her hometown and, entrusted by a fellow villager, escorts an injured elderly man to the county hospital. The village road is narrow, but she runs into a wedding motorcade blocking the way. Wang Chunlan, the groom's mother, strictly adheres to the old custom that "wedding cars must not back up," refusing to detour ten miles or yield even half a step. Xu Ning pleads for accommodation, suggesting the newlyweds get out of the car or the empty car back up, but both are rejected. Chen Kai, the groom, echoes his mother, while only the bride Zhou Yao tries to persuade them multiple times to no avail. Amidst the standoff, the truth comes to light: the injured person is actually Wang Chunlan's father-in-law. Shocked, Wang Chunlan still hesitates. Finally, driven by Xu Ning's rational persuasion, Zhou Yao's persistence, and the traffic police arriving to coordinate, the wedding motorcade slowly backs up, clearing the path of life. The elderly man is promptly sent to the hospital for emergency treatment.