Qing Yuan, an ancient book restorer, received a fragment of the Ming Dynasty edition of "The Essence of Materia Medica". The name on the receipt was Shen Yan - her old partner who stayed up late to write a book and removed stitches and mended holes together seven years ago. He was also her ex who slammed the door before leaving and never looked back. Now that Shen Yan has been transferred as the team leader, the new regulations require "retaining the original old threads." However, the warehouse is too dry, the cotton threads are weathered, and the old threads will rot without removing the paper holes. Seventy holes, remove one and lose a piece of the past, fill one hole and fill an old hole. Colleague Zhou Yan handed over new paste, and Shen Yan left the softener. She held the tweezers and repeatedly tormented the frizzy and prickly threads. The book can be dismantled and reassembled, but the human heart has been dismantled once and the holes have become crooked. A thread can be hidden for four hundred years, but a heart can only be sealed once.
