Lele, a college student, was adopted by "Old Man Gu" when he was a child. The grandfather and grandson depended on each other and struggled to survive. Before Lele could take care of and repay her grandfather, "Old Man Gu" died in poverty and depression. , Lele read her grandfather's diary while sorting out her belongings, and learned that her grandfather was a graduate of a prestigious university. Fifty years ago, an educated youth went to the countryside for reform. He was framed by his lover and betrayed by his friends because of his quota for returning to the city. He was stigmatized as a "gangster" and missed the honor of "model worker" and the opportunity to return to the city. His grandfather became discouraged and depressed amid the abuse and ridicule. Not only did he never marry, but he was reduced to looking at gates and picking up scraps for a living. Lele felt sad and sorry for what happened to his grandfather. By chance, Lele traveled to 1975. He decided to expose the bad guys' tricks, help his grandfather become a model worker, marry the woman who truly loved him, and live a happy life...
