In the twenty-fifth year of the Republic of China, a new history teacher came to Nanjing Zhongshan Middle School.
He always walked into the abandoned library alone at midnight and gave lectures to a sealed ancient well.
Students rumored that the well contained a librarian who was buried alive by the Japanese army during the Anti-Japanese War.
Until the night of the school anniversary, the ancient well suddenly seeped out black water like ink, and a bloody word written in Japanese appeared on the mouth of the well: "The day when the book is returned, the time when the life is claimed."
And the history teacher, holding the saber of the Japanese commander, stood quietly by the well and smiled.