Ji Myeong-hyun, a 50-year-old man (at the age of fifty, "jicheonmyeong"), dies after slipping on an icy road and is reincarnated with the memories of his past life. Having parents for the first time, he lives a life more than satisfied with his reincarnation. One day, he's street-casted by an agency: "Hey, friend, have you ever thought about becoming an idol?" With his memories of his past life and realizing this reality offers him better odds than winning the lottery, he decides to challenge himself to debut as an idol. He ends up joining 'YEARZ,' the group of Baek Jae-heon, who was both his favorite idol and the apple of his former coworker's eye. The emotional switch that had never been activated before, suddenly turns on.