Jang Ki-joon (Lee Beom-soo) used to be a top manager in the business but he went bankrupt as he couldn't compete with other powerful agencies.

On Air revolves around these four entertainment industry figures - a director, a writer, an actress, and her manager - as their personal and professional lives intertwine during the shooting of a drama.

It also portrays how the whole production team and performers complete a project in a tight schedule as well as how actors, actresses, and entertainment agencies handle rumors surrounding them.

Song Yoon-ah also asked her celebrity friends to appear on the show, namely Lee Hyori, Kang Hye-jung, Uhm Ji-won, and comedian Kim Je-dong.

Park Yong-ha and Song Yoon-ah visited Japan to promote it in a showcase attend by 800 VIP guests at Toho Cinema in Roppongi Hills, Tokyo.