Seo Hyeon-U is a member of an idol group that's about to debut. On the day of their profile photoshoot, an accident left a hideous scar on one side of his face, causing his dream of debuting to collapse. Fortunately, he became an idol trainer with the recommendation of his manager, but he still spent his shabby days in sorrow. One day, he got on a plane with the idol group in charge of going abroad, but an unexpected incident caused his plane to crash!! When he woke up, realized that he has been transported to back when he was 19 years old; when he was preparing to join the debut team. Seo Hyeon-U, an idol in the body of a 19-year old boy but who has been strengthened by his experience as a trainer. This is the story of his growth to become an idol once again! (Source: Kakao, translated)