In order to avoid being expelled from school, Ye Zi Jie lied and pretended to be sick. He used all kinds of tricks, including putting panda make-up to pretend to look pale, riding his bike into a fence, or even telling his teacher he was not fine to order to sleep at the school health room. Unexpectedly, the teacher sent Ye Zi, the class monitor who has the same name as him, to show special concern. She always has evidence about his fake illness, and she follows closely just to confirm whether he is really sick or not. Gradually, the two get to know each other better in the spy-to-spy interaction, and become closer and closer...