In the old alley of "Yunzhou", there is a time printing shop that is about to "cool". The owner Lin Xiaoxing has a secret - when she uses the old-fashioned printing machine left by her grandfather to develop photos, she will occasionally develop memory fragments that the owner of the photo has forgotten: it may be a lost rag doll in childhood, or a confession that was missed when she was young. One day, a man named Shen Yan took a single photo from the Republic of China period for printing. The woman wearing a cheongsam in the photo looked exactly like the "Time Woman" that Lin Xiaoxing had repeatedly dreamed about. What's even more bizarre is that the old pocket watch Shen Yan carries with him emits a faint light every time it is near the printing machine, and those "memory fragments" become particularly clear. As the contact deepens, Lin Xiaoxing discovers that he is a "memory printer" who can awaken others' precious memories through old photos, while Shen Yan is the guardian who searches for "time tokens" across time gaps. These tokens are not only related to his grandmother who has been missing for many years, but also hide the secret that the old alley is about to be demolished. While helping old neighbors retrieve their forgotten memories, the two of them fight against the "Blank Organization" who wants to use "memory fragments" to control others. In the process of traveling between the past and the present, they gradually piece together the bonds of time that belong to them.
