Episode 21 recap: Liang An'er was killed to keep her silent.

Both thief soldiers were intoxicated by the wine dregs mixed in their food by Cheng Biyuan and fell asleep on the table. Liang An'er entered and poured a basin of cold water on them. The two startled and woke up immediately. Liang An'er urged them to hurry and chase after Cheng Biyuan. Cheng Biyuan ran frantically in the forest but was eventually caught by the thief soldiers and Liang An'er. Cheng Biyuan tried to persuade Liang An'er to reveal the mastermind behind the scenes. However, Liang An'er commanded the thief soldiers to kill Cheng Biyuan. Just then, Prince Qi arrived in time. He killed one of the thief soldiers, while Liang An'er held Cheng Biyuan at knifepoint. Prince Qi persuaded her not to act impulsively, reminding her that they grew up together and knew her kind-hearted nature. Persuaded by Prince Qi, Liang An'er involuntarily dropped the knife.

Prince Qi quickly supported Cheng Biyuan, and at that moment, another injured thief soldier lying on the ground took the opportunity to pick up a sword and stabbed Liang An'er from behind. He then took his own life by committing suicide, realizing that he couldn't escape. Prince Qi hurriedly supported Liang An'er, and she closed her eyes in his arms. After Prince Qi and Cheng Biyuan returned, Li Yuer was furious. It turned out that these thieves were indeed targeting her, and she was determined to kill them.

Everyone advised her to calm down and sit down. Prince Qi analyzed that Liang An'er's death was suspicious. It seemed that there were people within the court colluding with the Western Liang faction, apart from Prime Minister Liang. He decided to attend the court and discuss countermeasures with the emperor. However, when he reached the palace, the guards informed him that the emperor was unwell and could not see anyone. The empress dowager also advised him not to trouble the emperor any further and to return.

Cheng Biyuan, who came along, had a sudden idea and said she had a solution.