A documentary film weaving the behind-the-scenes history of the music industry, centered on hit songs spanning half a century from the 1920s to the 1960s. Through the narration of actor Kim Jin-gyu, performance materials are presented, offering a glimpse into the golden age of top singers of the era such as Go Bok-su, Baek Nyeon-seol, Hyun In, Jeong Hun-hee, Yoon Bok-hee, Lee Mi-ja, Patty Kim, and Nam Jin.