When he visited his mother, Xiao Xin tells him about the details of Consort Jing's incident with the medicine. He is angered and thinks that Mei Changsu did not care about his mother's safety as well as Wei Zheng, causing him to sever his trust in the strategist. To stop him from doing anything rash, Mei goes to the Jing manor to explain the story more clearly to the prince. Prince Jing is adamant that he save Wei Zheng, which is what Mei is hesitant to do. Nevertheless, he acquiesces, enlisting Xia Dong and Yaoweng warriors for his plan. (Source: Wikipedia)