Father (Teng Rujun) has been a postman all his life. His job is to deliver mail to the remote mountain areas of Hunan, China by foot. He is in his late 40s. But now, poor health is forcing him to retire. He cannot trust anyone else but his son (Liu Ye) to take over the job. The morning comes that Son is ready for his first trip as a postman. It’s going to be a 3-day trip., 122 kilometers, as it always is. Father cannot rest easy, ans insists that heill come along, knowing the importance of his job, and not quite able to give it up…

This is Son’s first trip and Father’s last. They have never taken a trip together.