- **A Reunion Across Time**: While restoring an ancient painting, art conservator Lin You unexpectedly transmigrates into the body of a high school senior. She discovers that the boy in the painting looks exactly like her deskmate, Shen Tingbai, and the red mole on his wrist becomes a bond spanning time and space.
- **Tensions Beneath the Surface**: Being a transfer student puts her at risk of being ostracized. Shen Tingbai quietly stands up for her, from leaving breakfast in her desk to holding an umbrella for her on a rainy night. His secret affection is hidden in every little gesture.
- **Piecing Together the Fragments**: A tender whisper in the hazy infirmary, an old sketch in a hidden passage in the art studio: the obsession of the figure in the painting, who lived three hundred years ago, gradually comes to light.
- **Finding Salvation in Each Other**: An unexpected turn during the school cultural festival’s stage play sparks their feelings. Shen Tingbai’s long-suppressed affection and Lin You’s racing heart intertwine beneath falling pagoda blossoms, forming a red thread of fate.
