The story of Geon U and U Jin, who previously took down a vicious gang of illegal loan sharks, and then now throw another refreshing straight hook against a global illegal boxing league that they get dragged into by Baek Jeong. He possesses overwhelming power, so much so that he can even defeat world boxing champions, and he does not hesitate to use any means necessary to drag the promising boxer, Geon U, into the dark league.
