It is an emotional journey, telling a moving story between a former school teacher and a young boy.The teacher now makes a living by writing letters for illiterate people, and the boy has just lost his mother and embarked on a journey to find his father he had never met in his life.The two of them have intertwined fates and are companionship with each other. In the process of finding their relatives, they gradually enter the depths of each other's hearts.This is not only a journey of seeking relatives across mountains and rivers, but also an emotional journey of healing pain and regaining hope.