As a fan of idol Ryu Sunjae, Im Sol was happy fangirling to her heart’s content. That is until one day, Sunjae is suddenly found dead. As she grieves, Sol discovers a curious pocket watch that takes her six years into the past. Before she knows it, Sol tracks down a teenage Sunjae, and the words “I freaking love you!” spill out. Now, he’s totally creeped out by her, but Sol must somehow win over Sunjae to stop history from repeating. With the clock ticking, can she save her future number one?