It depicts the latest story of "doomed idols" who need a hit single to avoid being disbanded. It is the story of young people who confidently continue to pursue their dreams whilst growing through their failures and taking bold steps towards their new goals. Kim Je Na has been a member of Cotton Candy for the past six years. Cha Jae Hyuk is the managing director of the entertainment company that manages Cotton Candy. Seo Ji Han is a member of the popular idol group Mas, which belongs to the same entertainment company as Cotton Candy. To avoid being disbanded, Cotton Candy need just one hit.