Chen Wende ate the noodles that Feng Yao cooked for Moxi, so Moxi had no choice but to hurry up and eat the noodles before he finished eating. Wu Yin saw Feng Yan and told her that there were two assassins today, one was dead without evidence, and the other fled without a trace. Wu Yin tortured the Patriarch of the Zhao family, and learned that Mr. Wen in the Academy was recommended by a friend in Jingzhou, so he sent someone to Jingzhou City to investigate. And Zhang Xiangan, a student of Ding Eryuan, is a student included by Feng Yan. Feng Yan explained that Zhang Xiangan's father is Zhang He, the third rank Youwuwei general who retired from old age and returned to his hometown, and his identity is not suspicious.
Wu Yin knew that Qingzhou Women's School would not accept students midway, and after asking, she learned that Feng Yan had collected one hundred taels of gold collar from Zhang's family. Wu Yin ordered his subordinates to torture Zhang He and learned that Zhang Xiangan's surname was Sun, and she was the younger sister of Sun Jingyun who had suddenly married away earlier. His biological father was convicted of betraying the whole family and exiled because of the impeachment of Lord Hou. The two sisters Sun Jingyun were secretly rescued by Zhang He and adopted as righteous daughters. Later, Sun Jingyun entered Qingzhou Women's School as a teacher, and accidentally learned that Ming Dehou would come to Qingzhou Women's School to find the Queen Mother's handwriting, and then he felt revenge. Zhang He bought Sun Jingyun's younger sister to enroll in the school. Sun Jingyun colluded with his adoptive father and younger sister to formulate a revenge plan, lurking in the academy, waiting for an opportunity to assassinate Lord Hou.
Wu Yin threatened Feng Yan with the crime of conspiracy, and learned from her that she and Sun Jingyun had a conflict because of the cooperation in presenting treasures. She noticed that Sun Jingyun was behaving strangely, and then found the queen mother's calligraphy and some engraving tools in her room. Sun Jingyun suddenly When they came back to break the matter, the two had a dispute because of this, and accidentally tore up the Queen Mother's original work. At that time, she was angry and panicked, so she knocked Sun Jingyun unconscious and imprisoned her, trying to get the treasure's hiding place from Sun Jingyun's mouth. Later, because of sister Bai Fengyao, she wanted to drown several people in the water prison, so now she doesn't know if Sun Jingyun is alive or dead.
Wu Yin thought of what he had heard when he threatened Feng Ming, and believed that the Moxi sisters had the iron ore map in their hands, but the sisters didn't know it. Chen Wende planned to stay in Moxi's room temporarily, and leave when the search outside was slack. In the middle of the night, Moxi asked Chen Wende why he was looking for iron ore maps. Chen Wende said that as long as he found iron ore, he could make a lot of elite soldiers and weapons. He didn't want the iron ore map to fall into the wrong hands, he just wanted to wait for the opportunity to tell the truth to the Holy One after getting the iron ore map.
Because Bai Fengyao and others blocked Feng Yan's major event of revitalizing the lintel, she held a grudge and planned to kill them all. She sneaked into the dormitory of the girls' school and was discovered by Zhou's mother-in-law, who took advantage of her unawares and killed her. When Chen Wende heard the news and went out to check, Granny Zhou blew incense into Shen Shumo's room, and kidnapped Bai Fengyao after entering the room. Moxi heard the news and rushed to find that Fengyao had been kidnapped. Granny Zhou asked Moxi to bring the small round pot because it was the iron ore map.
Moxi went back to the house and found the round pot. At this time, she also realized that when Feng Ming was hit with the round pot, Feng Ming accidentally let Feng Ming see the pattern and text on the bottom of the pot, and guessed that it was the iron ore map. Chen Wende sensed that Moxi was in danger, and wanted to rush to save her but was stopped by Wu Yin who rushed over.
Granny Zhou hated Sun Jingyun for engraving Queen Mother Zhong's iron ore map on the bottom of the pot, so that no one could find it. Grandma Zhou was rescued by Empress Dowager Zhong on her way to escape. Now that Queen Mother is no longer alive, she also wants to repay this kindness. She didn't know about the Iron Mine Map, but accidentally learned about it from Feng Ming. When she heard that Feng Ming insulted the Queen Mother in private, she killed Feng Ming in anger.
Chen Wende and Wu Yin fought, and the two were evenly matched in martial arts. During the fight, they entered Shen Shumo's room and saw her hijacking Bai Fengyao and wanted to leave. Moxi told the two that the map of the iron ore was on the pot in Granny Zhou's hand, and that Granny Zhou had already informed Lord Hou that she wanted to hand over the map of the iron mine to the Holy Lord through Master Hou. At this time, Lord Hou and Changshi came, Chen Wende took the opportunity to assassinate Granny Zhou, rescued Fengyao from her hand and handed it to Moxi, then snatched the round pot and quickly left Qingzhou Girls' School.
Moxi was worried that Wu Yin would tell Lord Hou about Chen Wende, and wanted to take Feng Yao away in a hurry, but when she came to the gate of the academy, she found that Mingdehou had already left the place. She temporarily decided to stay in Qingzhou Women's School with Feng Yao. Shen Shumo came to Feng Yao's room and inscribed Sun Jingyun's previous poem on the wall to commemorate their friendship. When Wu Yin came here, he felt that the relationship between them was so good. Shen Shumo thought that Wu Yin did not have such a friend, but Moxi said that he was Wu Yin's friend, which touched Wu Yin's heart.