Only after Wen Qingyi died did she realize she had transmigrated into a book. The main villain was a tyrant who flew into a frenzy every few days and eventually killed both the hero and heroine. Her family was also wiped out when bandits burned, slaughtered, and looted their home amid the social upheaval. Wen Qingyi's soul drifted until it came upon a metal sphere. The sphere promised to let her live again, on the condition that she set the tyrant straight. Wen Qingyi agreed. This time, starting at fourteen, she disguised herself as a boy and stayed by the little tyrant's side to protect him. To her surprise, the boy was actually a good person. He only lost control and went mad because someone had been drugging him since childhood. Fortunately, before transmigrating into the book, Wen Qingyi had been a master physician of traditional Chinese medicine. She devoted herself to helping the little tyrant purge the poison from his system.
Two years after the little tyrant ascended the throne, Wen Qingyi saw that the poison was gone and that he had become a wise ruler. Deciding she had completed her mission, she prepared to leave without a backward glance. The little tyrant didn't dare stop her, so he let her go. A year later, unable to bear it any longer, he summoned her back to the capital and waited eagerly, only to learn that she had returned with her future wife!
The little tyrant promptly went mad on the spot!
