Hae-Ra (Min Hyo-Rin) is 21-years-old. Her dream is to debut as a singer to let people know about her late father's musical compositions. Hae-Ra then takes part in the music TV contest program SuperstarK 2 with her childhood twin friends Se-Jong (Kwak Si-Yang) and Se-Chan (Jin Young).

They get through the local tryouts and are selected to take part in the program. At super week, Hae-Ra, Se-Jong and Se-Chan area teamed with Henry (Henry), Woo-Ri (Yoo Sung-Eun) and Jang Goon (Park Kwang-Sun), 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.