Su Tang, an emergency room doctor, died suddenly after staying up late at night and entered into a male protagonist's story she had read. At this moment, she has become the Bai Yueguang of the beautiful, powerful and tragic male protagonist Gu Changyuan in the book. To be precise, she is the person who cannot survive the opening chapter and is poisoned to death in the back house. In the end, she becomes the perfect excuse for the male protagonist to completely go dark and bloodbath the capital. The terrible thing is that there are only five days left before she dies from the poison.