Nirvana in Fire Episode 14

Mei Changsu promises the Marquise that he would keep the incident a secret, because he wanted to save people with devotion and loyalty like Yan Que. To save Minister He's son, Prince Yu captures a tramp to be executed in He Wenxin's steed. However, Mei leaked the incident to Xie Yu, who used the opportunity take down both Minister He and the Minister of Justice, Qimin. On New Year's night, when the Emperor sends out twelve teams to present the royal dishes for the twelve vassal families, one of the teams were murdered overnight, causing Meng Zhi to be punished. The murder was instrumented by Xie Yu, so that he can slowly erode the Emperor's trust in Meng Zhi; he and Zhuo Dingfeng invite martial arts experts to the capital to continue their plans. (Source: Wikipedia)