Lee Ji Hoon and Choi Woo Seung are two childhood friends who also happen to be preparatory students for the civil service exam, although Ji Hoon has a secret dream to be a singer and songwriter. One day they meet Yoo Hyun Jae, a popular but problematic member of a popular '90s idol group who accidentally traveled through time to the year 2017 from the year 1993. Thus begins the story of
