"Bai Shi Tong Da" is a mysterious organization. They never fail in the tasks they take over and always respond to requests. Chen Chengcheng is a member of Bai Shi Tong Da. His lover Chu Yi is an invigilator active in the folks. She is impartial and has a clear distinction between love and hate. After seeing Chen Chengcheng being very good with girls, Chu Yi ran away in anger. By chance, Chu Yi, the invigilator, was entrusted by the owner of Huadongzi gouache shop, Leng, to disguise herself as a candidate and take the exam for Huadongzi gouache shop. Chu Yi happened to meet her former lover Chen Chengcheng in the examination room again, and Chen Chengcheng was entrusted to take the exam for someone else...