As a super-fan of outcast idol Ryu Sunjae, Im Sol was happy fangirling to her heart’s content—until Sunjae dies in a tragic accident. As she grieves, Sol discovers a curious pocket watch that takes her six years into the past. Her first priority is tracking down a teenage Sunjae, but when she meets him, her inner fangirl emerges in full force. Sunjae is totally creeped out, but Sol is determined to win him over and prevent future tragedy. With the clock ticking, can she save her number one?