Kim Deuk Pal is a 47-year-old gangster and the second-in-command of his gang. Due to his poor family background, he lacks an educational history but dreams of attending university. He works hard to achieve his dream, but it's not easy at all. One day, he sees a young man named Song Yi Heon about to commit suicide. At that moment, Deuk Pal's spirit has taken over the body of the 19-year-old high school student who is suicidal. Deuk Pal soon learns that Yi Heon is a victim of bullying, which is why he wants to take his own life. Now, in Yi Heon's body, Deuk Pal confronts the bullies to punish them and becomes friends with his classmate Choi Se Kyung. Se Kyung appears to be an exemplary student in perfect condition, but at home, he suffers from domestic violence at the hands of his father.
