Lee Chang-sik

Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

Student teacher Kang Eun-kyung encounters a group of girls in a black magic club who are topping the national mock exams.