During the Republic era, a new manuscript at a Jiangnan bookstore was about to be sent for printing, but it went missing from the locked cabinet, leaving behind blank wrapping paper and a forged rejection letter. The bookbinder faced suspicion, and the investigator tracked clues from rope knots, paper corners, and the signed broken brush. The backup manuscript confirmed the author did not request a rejection, and the real manuscript, old manuscript collection slips, and forged letter draft in the paper warehouse exposed the partner's attempt to monopolize the manuscript and deposit money. Everyone confronted each other to clear up authorization and manuscript fees, retrieved page seven from the notebook, completed the final sentence, rebound the work, and had the two authors personally arrange for printing.