Su Wan's daughter hits a wall enrolling in school, and private school principal Zhang Cheng seizes the chance to arrange a meeting, where he verbally harasses her and dangles a quid pro quo. Su Wan is disgusted at first, but worried about her family, she doesn't tear into him on the spot and chooses to play along tactfully. From beginning to end she fails to hold her physical boundaries, and an improper relationship occurs. In the end, to gather complete evidence, Su Wan is repeatedly subjected to the principal's various manipulations.