The Taiwanese drama revolves around a 27-year-old woman named Huang Yu Xuan (Alice Ke) who longs for Wang Quan Sheng (Greg Han), the love of her life. She constantly checks his social media pages in desperate hopes that he will call her. But one fateful night, Huang Yu Xuan is hit by a car. She regains consciousness and sees a man she believes to be Wang Quan Sheng sitting by her hospital bedside. However, she learns that she is no longer a 27-year-old woman, but is now a high school student named Chen Yan Ru in the year 1998. The man by her bedside is not her boyfriend after all, but a schoolmate named Li Zi Wei.