Princess Shouan saw Zhang Yongyao burning something in the courtyard from a distance. Zhang Yongyao was actually burning the little things that Princess Shouan had prepared for the children. Zhang Yongyao often came back to see Princess Shou'an while he was burning, because he might never come back to speak with the children. Princess Shouan still had a grudge against Yuzhan, and she had her own plan to see the princess mansion for the last night.
Wan'er prepared the fragrant pills ordered by Yuzhan and gave it to Yuzhan. Yuzhan asked the imperial physician for examination on the spot. The imperial physician revealed that the chickweed leaves in the fragrant pills smelled like Longjing. Although the chickweed leaves are non-toxic, they can be highly toxic when combined with green plum. When Yuzhan interrogated Wan'er why she wanted to harm her, Zhang Yongyao asked to see her. On the other side, Princess Shou'an learned that Zhang Yongyao had entered the palace, and said she had already guessed that Zhang Yongyao would enter the palace to expose her. Princess Shou'an was also preparing to enter the palace, and brought a dagger and dragged Yuzhan to hell.
Zhang Yongyao said that he had found some clues and wanted to talk to Yuzhan. Unexpectedly, Zhang Yongyao stabbed Yuzhan with a dagger as soon as he left the crowd, but Zhang Yongyao deliberately fell down and failed to assassinate. Zhang Yongyao said that he hated Yuzhan's poison, and the person who wanted Yuzhan to die was also himself. Princess Shouan happened to hear Zhang Yongyao's confession, and she was so scared that her capital fell. Zhang Yongyao continued to help Princess Shou'an conquer the crime, but Yuzhan had known from the imperial physician that it was Princess Shou'an's green plum and Wan'er's chickweed leaves that framed her. Princess Shou'an admitted that she was responsible for the poison, saying that Yuzhan had ruined her happiness and her children. Yuzhan is very angry, saying that Princess Shou'an may have something to do with her losing her child, but Princess Shou'an's happiness has nothing to do with her. It is the princess who never trusted her. Afterwards, Yuzhan gave Princess Shou'an another chance and would not tell her Majesty that Princess Shou'an was poisoned, and Zhang Yongyao's assassination was regarded as Zhang Yongyao offering her a dagger.
After returning to the princess mansion, Princess Shouan asked Zhang Yongyao to make peace. Zhang Yongyao disagreed, saying that ever since he married Princess Shou'an, he swore to be a concierge for one day and for life.
Wan'er told Yuzhan with a bitter look that she was Fu Wan'er, the daughter of Fu Yantong from Pengze Xuzhou, the woman who was rumored after Yuzhan was buckled by the Fu female emperor. Fu Wan'er rebuked Yuzhan for selfishly killing her family, and Yuzhan apologized to Fu Wan'er. Lan Pei could not understand that his wife was wronged by Wan'er, saying that it was not Yuzhan who killed Fu Wan'er's family but the first emperor. Yuzhan had sent people to save Pengze Fu's family long ago, but only after he came one step later did he save Fu Wan'er . And the person who saved Fu Wan'er was General Zhang Sheng, who had a Beijing accent. Fu Wan'er slumped to the ground decadently, unexpectedly Yuzhan was her lifesaver.
Yuzhan thought about Xue Rong and claimed that it was Fu Wan'er's poison, and Fu Wan'er was her Pengze Fu's daughter, so she asked Xue Rong to give her a favor and let Wan'er go out of the palace. When General Zhang Sheng rescued Fu Wan'er, Fu Wan'er dropped a hairpin. Yuzhan returned the chaizi to Fu Wan'er, and Fu Waner recognized that the chaizi was a relic given to her by her mother. Fu Wan'er was waiting for Yuzhan to be sentenced to death, but she did not expect Yuzhan to release her from the palace. When Yuzhan turned around, Fu Wan'er pierced her neck with a hairpin, saying that she would never owe Yuzhan any more. Yuzhan was taken aback, and ordered his servants to put Fu Wan'er's body back to Peng Zefu's house. It didn't take long for Yuzhan's disease to be almost healed.
The news that the first emperor had an illegitimate child has spread throughout the capital, and Li Huaijin asked Yueying to make the next step. Yueying sneaked into the mansion of the King of the Imperial College, and Xue Rong received a secret memorial the next day, saying that Wang was holding the wooden sign of the Emperor and tried to contact the illegitimate son Jiang Shao. Subsequently, the jade pendant wooden sign was found at the mansion of the King of the Imperial College. Xue Rong Longyan furiously asked the crime king, and Wang said that he did not know, and shouted wrong. Xue Rong temporarily imprisoned Wang Zhu in the prison, and then sent Jiang Shao into the palace. Before entering the palace, Jiang Shao was worried about how to ask Wei Wang again for marigolds, and he even bought an expensive betrothal golden goose.
When Xue Rong and Jiang Shao were eating, they first tested Jiang Shao's idea of being an emperor. Jiang Shao said that he did not have the idea of an emperor, and he was not free when trapped in the palace. Afterwards, Xue Rong took out the jade pendant and told Jiang Shao that Jiang Shao was the illegitimate son of the first emperor. Jiang Shao's first thought when he learned that he was the prince was that Wang Wei could no longer say that he was not worthy of Jinzhan. However, the exposure of Jiang Shao's identity may cause the officials to impeach Xue Rong, who is not of an orthodox bloodline. Xue Rong wanted to destroy the jade medal and prevented Jiang Shao from verifying his identity. Jiang Shao hesitated because it was his mother's relic.