C668 I'll go too

To be fair, the main point was that Master's wife, Cheng Yue Wan, had been killed by Master's enemy, and the one who had indirectly killed the previous Mistress, Cheng Yue Wan, was the current Mistress, who was also Cheng Yue Wan's younger sister, Cheng Yuehua. Of course, this also involved an important person, Li Mingcheng.

As to who Li Mingcheng was