Wei Zhao visited the Dali Temple prison at night and asked Jiang Ci about all the details of the day of Xie Chi's family dinner. Wei Zhao recorded them one by one, hoping to find out the real culprit who framed Jiang Ci. He sent Yi Fei to investigate and verify them one by one.
Wei Zhao found out that the ginkgo and hibiscus soup that Jiang Ci drank for Xie Che was cooked by the palace maid Liu Cui, so he conducted a surprise interrogation of Liu Cui. Liu Cui admitted that she was sent to Yuchunxuan by Tao Zizhu, the general manager of the palace, responsible for monitoring Jiang Ci's every move. , Jiang Ci fell in love with Liu Cui as a sister, Liu Cui also regarded Jiang Ci as a relative, and she vowed never to hurt Jiang Ci.
Wei Zhao and Yi Fei investigated separately and found nothing unusual. Wei Zhao suspected that Xie Che had poisoned himself in order to frame Jiang Ci and took the opportunity to test his loyalty. Wei Zhao thought about it carefully and was very scared. He knew that Xie Yu was interested in the position of the prince. Having coveted it for a long time and suspecting that Xie Yu sent people to poison and frame Xie Chi, Wei Zhao sent Yi Fei to Lanyue Tower to find some new songs. Afterwards, he took people to the East Palace to check carefully.
Pei Yan never forgot Jiang Ci, but it was inconvenient to visit him in the palace. When he learned that Jiang Ci was suspected of poisoning Xie Che and was taken to prison, Pei Yan immediately went to see the prince Xie Chi. Xie Yu went to Lanyue Tower to drink and listen to music. Wei Zhao came to see him specially and tested him in every possible way, but Xie Yu was always absent-minded.
Wei Zhao met Pei Yan when he went out. Pei Yan and Xie Chi made an appointment to meet at Lan Yue Tower. Pei Yan firmly believed that Jiang Ci would not poison and begged Xie Chi to find out the truth and restore Jiang Ci's innocence. Xie Chi advised Pei Yan not to get involved. Jiang Ci had been escorted to Dali Temple. Pei Yan wanted to see Jiang Ci, but Xie Chi couldn't resist him and had to agree to arrange for him to meet Jiang Ci.
Pei Yan came to the prison to visit Jiang Ci and brought the medicine prepared by Cui Liang. Pei Yan vowed to rescue Jiang Ci. Jiang Ci had already been discouraged. Pei Yan saw this and was anxious in his heart. He figured out the whole story. After reading it again, he suspected that Xie Che had poisoned himself in order to get rid of Jiang Ci. He broke out in a cold sweat and decided to use Xie Chi and Xie Yu to exonerate Jiang Ci. Tong Min secretly came to Xie Yu's house in the dark and took away the knife used to slice geese for Xie Che during the family dinner. Yi Fei also went to Xie Yu's house to investigate, and he and Tong Min met unexpectedly.
Pei Yan heard from Tong Min that Wei Zhao was also secretly investigating Jiang Ci's case, so he invited Wei Zhao to Lanyuelou for an interview. Both of them wanted to rescue Jiang Ci, and they came up with a good idea. The Crown Princess was poisoned and fell into a coma. Both she and Xie Che were poisoned by the Jiujie Peach. Pei Yan smeared the Jiujie Peach poison on the goose knife, and sent An Cheng to secretly put it in the trash can in Xie Yu's house, and then put it away. The news was revealed to Prince Xie Chi.
As expected by Pei Yan, Xie Chi came to Pei Yan with the piece of goose knife to discuss countermeasures. He didn't believe that Xie Yu poisoned Xie Che and wanted to go to him in person to find out. Pei Yan advised him not to act rashly. Maybe Xie Yu's target was not Xie Che but him. Xie Chi remembered that the princess was also poisoned, and he believed Pei Yan's guess. Pei Yan suggested that he give the Pian Ge Dao to Master Yushitai Yin.
This was a plan carefully arranged by Pei Yan and Wei Zhao to draw suspicion to Xie Yu. Wei Zhao wanted to persuade Jiang Ci to cooperate well during the trial, so he sent Jiang Ci out of Qingkang. Jiang Yuan was ordered to go to Mingzhou and Yueluo to investigate the details of Wei Zhao, and found out that Wei Zhao was Xiao Wuxia, the son of Xiao Haitian, the lord of Yueluo City, and that Jiang Ci and Xiao Wuxia were husband and wife.
Liu Cui came to the prison to visit Jiang Ci and brought the clothes that were burned beyond recognition. They were made by Yan Qiaoshuang for Jiang Ci. Jiang Ci missed the things and thought of her master Yan Qiaoshuang who died tragically. She was sad. Unable to live in pain, Wei Zhao asked Liu Cui to send a message to Jiang Ci, encouraging her to cooperate with the investigation and clear herself from suspicion so that she could avenge Yan Qiaoshuang. Jiang Ci braced herself to prepare for the last fight.
Yin Yushi received the poisoned goose knife and called Xie Chi and Xie Yu together with Yu Jiming, the minister of Dali Temple, all night long. Xie Yu recognized it as his knife and suspected that Xie Chi had framed him. Xie Chi denied it, and Yushi Yin didn't know how to make a decision for a while. He suggested that Dali Temple and Yushitai jointly try the case, and Xie Chi had no objection.
The more Xie Yu thought about it, the angrier he became. He invited Wei Zhao to go to the Moon Tower and drink wine together. He complained loudly in front of Wei Zhao. Xie Chi and Pei Yan came to the prison to see Jiang Ci. Jiang Ci did not poison her, but she didn't know who framed her. Pei Yan was fanning the flames. Xie Chi believed that Xie Yu was up to something and wanted to gain the crown prince's position.
Xie Yu accidentally saw Xie Chi going to the prison to find Jiang Ci. He dragged Wei Zhao to see Jiang Ci. Xie Yu insisted that Xie Chi framed him and asked Jiang Ci to testify against Xie Chi during the trial.