What should you do when a 1000-year-old imoogi named Bari suddenly appears in your apartment and demands you pay for the sins of your ancestors? Help him become a dragon, of course! Young Yoo's life is on the line as he teaches Bari the ins and outs of getting along with humans in order to prepare for the Nakdong River Dragon Exam. Will Young be able to help Bari pass the exam and become a full-fledged dragon?