Su Sui was forced to become the substitute partner of wealthy young master Gu Xici because she looked exactly like his missing Bai Yueguang. After signing the contract, she dreamed that she died tragically in three different ways, and the shadow of the Gu family emerged at each death scene. In order to survive in a certain death situation, she acted as a meek substitute while using the foreseen death fragments to investigate secretly. When all the clues pointed to a dark ritual that required the blood of a close relative, she was shocked to realize that she was not an accidentally similar substitute, but Bai Yueguang's supposedly "dead" twin sister. This time, she decided to tear up the script with her own hands and make the people behind the scenes pay the price.