In 2019, 27-year-old Huang Yu Xuan yearns for her missing boyfriend Wang Quan Sheng, presumed dead for two years. On her birthday, she wishes to "see him." Meanwhile, in 1998, 17-year-old Chen Yun Ru pines for a boy who doesn't share her feelings. Her birthday wish is to "become the girl Li Zi Wei loves." A mysterious cassette player transports Yu Xuan into Yun Ru's life as she awakens in the past,
