Everyone knows that Zhenbei Hou Xiao Heng is a cold-blooded, ruthless and powerful villain. He killed his brother at a young age and made countless killings in his life. Only Bai Yueguang, who died young, was hidden in his heart. The heroine, an ordinary prostitute, accidentally slipped into a book and became cannon fodder with the same name in the book, who could not survive three episodes. In order to save her life, she avoided the male protagonist everywhere, but she repeatedly saved Xiao Heng when he was in a desperate situation. She gradually discovered that the villain Hou Ye who was slandered by the world was actually tolerant and kind-hearted, unable to control himself, and all his cruelty was to protect himself. And Xiao Heng also gradually realized that the cannon fodder girl in front of him, every move and gentle eyebrows were exactly the same as the Bai Yueguang he had been obsessed with his whole life. In the end, the truth is revealed: without Bai Yueguang, his obsession has always been her across time, and his past memories are all self-descriptions of his long wait.