Giz and Auf are a couple that people envy. However, although Auf is tall and good-looking, he is a complete playboy. He was dating a girl named Ying at the cinema, and Giz saw them. Afterwards, Auf swore to his girlfriend that he had absolutely no feelings for Ying, which made Ying heartbroken and desperate. In the end, she jumped from the top of the skyscraper and died. Auf's swearing did not win back Giz's heart. With the help of her bestie, Giz began to enter the entertainment industry, and her future seemed quite bright. However, from that moment on, she could always feel that there was a "person" lingering around her that could not be detected by the naked eye. Her leisurely mood was gradually replaced by panic, and everything was developing in an unpredictable direction...