Wang Qiang (Xing Yuanyuan), the most naughty “scumbag” in the third class of junior high school, and Shi Miona (Wang Bowen), a cranky homeroom teacher, accidentally swap bodies. Wang, who had been oppressed for a long time, got a taste of being a homeroom teacher, and Shi also experienced the feeling of being considered the “school scum”. As the date of Shi’s open class competition is approaching, the two urgently need to find a way to change back into their bodies. But first, they’ll have to overcome numerous obstacles…

初三三班最调皮的“学渣”王强和“暴躁班主任”石妙娜意外互换了身体，压迫已久的王强过了一把当班主任的瘾，石妙娜也体会到了做“学渣”的滋味！石妙娜的公开课比赛日期临近，二人急需找到换回身体的方法，却遇到重重阻碍……

初三三班最調皮的“學渣”王強和“暴躁班主任”石妙娜意外互換了身體，壓迫已久的王強過了一把當班主任的癮，石妙娜也體會到了做“學渣”的滋味！石妙娜的公開課比賽日期臨近，二人急需找到換回身體的方法，卻遇到重重阻礙……