Xiuzhu sneaks into Ke'en's room to find evidence of her other man. A clue on Ke'en's table planner refreshes Xiuzhu's memory of the day they had seen a well-dressed woman slapping Ke'en and calling her a vixen. She is astonished by the irregularities. Xiuzhu's investigations uncover Ke'en's affair with her professor, Huo Yingjie, 10 years ago.
