Seo Ji-hoon

During the Japanese colonial era, roughly 400 Korean people, who were forced onto Battleship Island 'Hashima Island' to mine for coal, attempt to escape.

Kang Chan transfers to Myungsung High School in Busan from Seoul. Tough students at his new school hear the rumor that Kang Chan fought against 17 other students in Seoul. New student Seo Jae-Woo also transfers to Myungsung High School. He came from the same high school as Kang Chan.