Nirvana in Fire Episode 6

The emperor becomes suspicious of Prince Jing on how he knew that the princess was in danger. Before he can answer, Prince Yu comes and tells the emperor that it was he who told Prince Jing to save Nihuang, taking all the credit. Princess Nihuang realizes that it was Meng Zhi who told Prince Jing; Meng Zhi admits that he was carrying out Mei Changsu's plan. After that, Prince Jing visits Mei and tells him his rules: Mei cannot use certain people, especially the innocent, in his future plans. Meanwhile, Zhuo Qingyao tells Xie Yu about Xia Dong's progress in the Duke of Qing's case, including her discovery that Xie Yu protected the case's plaintiffs from Prince Yu's people. During a morning walk, Jingrui and Yujin meet the injured Xia Dong and helps her fight off assassins. (Source: Wikipedia)