It's 1992 in Busan. Donggil is a crazy fan of Seo Taiji and he lives with his dad Gukjin, his younger brother Yeonggil who's half-black, half-Korean. A year ago, Donggil found out that Gukjin isn't his real father. And due to Gukjin's different treatment of him from Yeonggil, he decides to leave the house. But he's just 11 years old. He can't just leave his house. He decides to become Seo Taiji's apprentice and seeks a way to earn money for transportation. Then he finds out that a dance contest with $1,000 prize is going to happen and plans to participate in it with Hyungmo and his gang.