Yongsae (Park Gun-hyung) was deliberately injured by his opponent in a dance competition. Since then, he was forced to give up his dancing career and did nothing all day. The owner of the dance studio couldn't bear Yongsae's waste of talent, so he invited Yongsae to return to the dance world and arranged for a Korean girl named Zhang Caimin from Jilin, China to be Yongsae's dance partner. Yongsae attached great importance to the arrival of his dance partner, and he also hoped that this would be his chance to revive his reputation. When he personally went to greet his dance partner, it was Cailin (Moon Geun-young), Cailin's sister, who arrived. Because her sister was about to get married, Cailin replaced her sister. What shocked Yongsae was that Cailin knew nothing about dancing, and Yongsae, who felt cheated, was extremely angry. With only three months left before the national competition, Yongsae decided to train Cailin to be a master of dance...