[5] C'est si bon (French for "It's so good") was an acoustic music lounge located in Mugyo-dong, Seoul.

[8][9][10] In the late 1960s, C'est si bon is the music lounge every unknown acoustic band dreams of playing.

It is where Geun-tae, a naïve country boy, meets musical prodigies and rivals Hyung-joo and Chang-sik.

As the three young musicians bicker over their music, beautiful socialite Ja-young enters the picture and becomes their muse, launching a series of moving love songs.

Ja-young falls for the pure-hearted Geun-tae, but they part ways when she accepts a once-in-lifetime shot at an acting career.