Yoo Baek, former idol group member, is now a popular singer and actor but he doesn't try to be a good guy to attract people. He is self-centered and he is brutally honest to others even if it hurts them. For that personality, Yoo Baek makes big trouble for himself and travels to a faraway island to getaway. In that island, he meets warm people, including Oh Kang-Soon. She runs a small supermarket and also dives to pick abalone and sea mustard. She is physically a very strong woman.
"Reply 1997" will focus on the extreme fan culture that emerged in the 1990s when idol groups took center stage and K-pop was blossoming. Moving back and forth between the ’90s and today, the story centers on the life of Seong Si Won (Jung Eun Ji), who idolizes boyband H.O.T, and her 5 high school friends.