Cheol-woo
'Junsu' a bumpkin who hates studying, 'Seok-tae' a bumpkin who hates to go to the army, 'Cheol-woo' a bumpkin who has nothing to do. The so-called "Righteous Bully" trio decides to go to Seoul with their mother's secret money. They arrived in Seoul, filled with dreams of a bumpkin, but on the verge of losing their money in front of their eyes. To make matters worse, they reunite with their senior, 'Man-su', and gets caught up in an entangling case that becomes out of control. The "Kkangchi" trio from Gyeongsang-do takes over Seoul!
Gwang-wook
Sang-gu, a notorious teenage street fighter, gets tired of fighting when he realizes there’s no match for him anymore. However, one day, his best friend Moon-je gets beaten up by Min-gook, the champion of mixed martial arts tournament in his school. Outraged by what happened, he decides to transfer to Min-gook’s school for revenge and enters the tournament. As he beats other opponents one by one, he gets closer to the big shot of the school, Min-gook.
Member of the military headquarters
朝鮮半島の南北に跨る火山・白頭山で観測史上最大の噴火が発生！大地震が起き、ソウルでもビルは倒壊し、漢江は荒れ陸橋は崩壊。未曾有の事態に朝鮮半島は大パニックに陥る。史上最悪の災害を止めるため、政府は白頭山の地質分野の権威である大学教授カン（マ・ドンソク）に協力を要請。カンは半島を崩壊させるほどのさらなる大噴火が起こることを予測する。タイムリミットは７５時間―
