Shin Jin-ah (Lee Min-jung), a onetime lead singer of popular girl group Purple, works as the DJ of the radio show "Wonderful Radio" on SBS station Power FM while also trying to restart her career as a solo singer-composer under her goofy manager Cha Dae-geun (Lee Kwang-soo).

When he challenges her to come up with a new segment for the show, she finally gets an idea from her restaurateur mother (Kim Hae-sook) in which members of the public come into the studio and sing a song to their loved ones.

The film's script was written by Lee Jae-ik, producer of SBS Power FM’s "Cultwo Show," who incorporated his own experiences in the movie, thereby giving viewers a realistic glimpse at the behind-the-scenes workings of a radio program.

[5] Lee Min-jung said she enjoyed playing both a singer and radio DJ, basing her performance on popular idol groups in her schooldays such as S.E.S.

[6][7] She also said she drew inspiration from her own childhood experience as an avid fan of radio shows, when she would laugh and cry at hearing peoples' stories broadcast over the airwaves.