Five-year-old Tangtang is an autistic child who is always immersed in his own world and has an unusual passion for history books. Whenever her fingertips ran across the words on the page, she would always fall into those yellowed time and spaces——
Every time she travels through time, she can be taken in by well-meaning people: in these smoky cares, Tangtang dodges from the initial silence, slowly learns to say "thank you", actively shares, and even points to ancient books and says to the doctor, "I have seen such a carriage."
Traveling back and forth between the past and the present is like a gentle healing. When she closed the history book for the last time, her eyes were filled with light. She would hold her mother's hand to visit museums, and tell "ancient stories" to kindergarten children. That little baby living in his own world finally found his way to the world in the folds of history.