Mr. K.K. Ho (Vincent Wong), is a leading “star tutor” with remarkable achievements. Lee Lung Kei (Hugo Ng), the stingy boss and principal of the cram school, regards Mr. Ho as a trump card. Chloe (Jennifer Yu Heung Ying), a traditional high school teacher, has always tried her best in teaching. Chloe despises K.K.'s teaching methods and refers to them as deviant. The two of them give tit for tat in class.