Lee Suan is the main vocalist of a popular Korean idol group of 7 years, “iridescent”. At the young age of 27, he decides to retire after 7 years of his life as an idol, which was filled with rumours of conflict and exclusion within the group. After a successful retirement press interview, he comes home and falls asleep while reading the news article regarding his retirement. When he wakes up, he realises that he has travelled back in time to before his debut!