Goo Hae Ra is 21-years-old. Her dream is to debut as a singer to let people know about her late father's musical compositions. Goo Hae Ra then takes part in the music TV contest program SuperstarK 2 with her childhood twin friends Kang Se Jong and Kang Se Chan. They get through the local tryouts and are selected to take part in the program. At super week, Goo Hae Ra, Kang Se Jong and Kang Se Chan area teamed with Henry, Lee Woo Ri and Jang Goon, but due to unexpected incident they lose. They go back to their daily lives. Several years later, through a shocking incident, the team gather again and make their debut.