Han-cheol and his buddies, Geon-mo and Min-ho, want to be the dominators of 11th grade. He gets rid of likely candidates of the 11th grade one by one. One of his opponents is Sang-gil and after school one day, they decide to fight behind an alley. The fight ends with the police appearing, and while the result is inconclusive, they each realize how good their opponent is.

In the middle of peaceful days as two top leaders, tender-hearted Jin-man and his friend Min-soo, though both martial arts school legends, felt a new thrill after a mysterious schoolgirl, Soo-jeong, visits their boxing club. Meanwhile, unidentified Japanese high school students begin to raise suspicions in Seoul. The former Japanese yakuza's son, Miura, and the hidden daughter of the Japanese prime minister and center of the nation's far-right forces, Miyo, stirs up a fight between Korea and Japan to determine who is the strongest. Korea vs. Japan! May the last baddest guy survive!