在某个 smallville里，张公公年迈体弱，但也 still has his own little stories to tell. His wife, Li, is always busy with her work as a teacher, never having time for him. But when a mysterious letter arrives in their small village mailbox, something strange happens.
The letter contains a hidden message that reveals a secret family history tied to the neighboring town of China. 李娣娣, Zhi Li’s daughter, is forced to travel alone to investigate the truth behind this letter. Along the way, she encounters many interesting characters who lead her on an unexpected journey.
As winter approaches, 李娣娣 returns home with a heavy heart but a new understanding of family and responsibility. The story ends with a touching reunion that reaffirms the strength of their relationships。
