Han Junxi (played by Jeon Yuyun) in 2023 missed her boyfriend Gu Yeonjun (played by An Xiaoxie) who passed away a year ago. While listening to the song "You to Me Again", her soul accidentally traveled to Kwon Minjoo (played by Jeon Yuyun) in 1998, and met Nam Shixian (played by An Xiaoxie) who looked like her boyfriend, and Jung Ingyu (played by Kang Hoon) who had a crush on Kwon Minjoo, and the story between the three unfolded.