Dokgo rebobinar

Kang Hyuk, a born fighter spends his time with Jae Wook and Bon Hwan in their hideout. One day Hyuk's friends rescue Kyu Soon who has been bullied by Dang Young high school gangsters and Kyu Soon becomes their friend. One day, Hyuk helped Tae Jin who cannot fight because he is the most promising player of Dang Young high school’s wrestling team. Gangsters find out that someone is taking care of Kyu Soon behind him and get furious. They set schemes for the revenge against Kyu Soon and his friends.

Jong Il wants to be a normal student after leaving the gang crew of Ki Cheon high school. But the crew finds out that Jong Il is the hidden fighter of Kyu Soon and plans to get him in trouble.  Dang Young gangsters set the scheme to beat up Kyu Soon and his friends. Kyu Soon and his sister, Hyun Sun are kidnapped and beaten badly. Hyuk, Jae Wook and Bon Hwan rescued them from gangsters. At the same time, Jong Il starts the fight with Ki Cheon gangsters at the school hallway. Because of this fight, he got suspension from the school. The next day, Hyuk, Jae Wook and Bon Hwan find out Kyun Soon's death. Hyun Sun despairs over her brother’s death. After Kyu Soon's funeral, Hyuk's crew takes good care of her.

Tae Jin starts dating Hyo Rim. After being suspended from high school, Jong Il become friends with Hyuk, Hyuk’s friends, and Tae Jin. Hyuk and Jong Il decide to take down both Dang Young and Ki Cheon gangsters for their own revenge. Dang Young gangsters deliberately abuse Tae Jin's girlfriend during Tae Jin's wrestling competition. Furious, Tae Jin knocks down Dang Young gangsters.

After Tae Jin's fight, Hyuk, Jong Il and Tae Jin declare a fight against Ki Cheon gangsters and train for weeks. Hyun Sun leaves Korea for a new life. Hyuk takes down the leader of Ki Cheon gangster and Jong Il, Tae Jin, Jae Wook and Bon Hwan beat the rest of the members in Ki Cheon high school. However, that night, Hyuk's twin brother is beaten up to death and his family gets destroyed. Hyuk prepares another revenge.