Lu Shi, the former national restorer of ancient books, can see the "traces of time" remaining on items:
Joy shines with golden light, regret condenses into gray mist, and unspoken love fades like morning dew.
He mended the tear stains on the divorce agreement, his father's old bicycle that had been repaired three times, and his mother's unsent letters...
But there is a price to pay: every hour of sewing marks, one day of blurred memory.
The whole Internet ridiculed him for "cultivating things but not the mind", so he quietly established the "Time Sewing Studio":
"Time cannot be turned back, but regrets can be gently put to rest."