Shi Miaona, a teacher, and her disruptive student Wang Qiang mysteriously swap bodies. With an important teaching competition looming, Miaona races against time to switch back before it's too late.

Wang Qiang, the most mischievous "scumbag" in Class 3 of Junior High School, and Shi Miaona, the "irritable class teacher", unexpectedly swapped their bodies. Wang Qiang, who had been oppressed for a long time, overcame the addiction of being a class teacher, and Shi Miaona also experienced the taste of being a "scumbag". Shi Miaona's public class competition is approaching, and the two urgently need to find a way to exchange their bodies, but they encounter numerous obstacles.