High School Return of a Gangster

A spirit of a middle school dropout gangster who accidentally possesses an 18-year-old boy's body who killed himself, goes back to High school to take a revenge against the bullies with his gangster skills and encounters unexpected relationship.

Kim Duk-pal in Song Ee-hun's body learns that the boy has been bullied severely and decides to help him. However, his weak body isn't as capable as Duk-pal's, and Choi Se-kyung, a classmate is suspicious about his true identity.

Duk-pal narrowly saves Ee-hun's mom from being kidnapped and tries to find a way to deal with Mi-gyeong. Myeong-hyeon tries to control Se-kyung, and Jae-min, who was almost involved in Min-seo's kidnapping, anxiously loiters around Ee-hun's house.

Duk-pal notices Dong-su who once was his right-hand man has something to do with Mi-gyeong and orders to bring her to him. However, it makes Dong-su suspicious because he feels Duk-pal, the late from Ee-hun.