She (Luo Xue) was a genius top student in school, but when night fell, she turned into a ghost who killed people without blinking an eye. She is in a huge group (Black Moon Group), and it may be that she has an ulterior secret in the group. And he (Xiao Xiyu) is an ordinary high school student. In an accident, he (Xiao Xiyu) saved her (Luo Xue). It was because of this accident that he (Xiao Xiyu) met his true destiny, and the seeds of love blossomed. But she (Luo Xue), who has never been true to her feelings, fell in love with the most ordinary and ordinary man (Xiao Xiyu), but her (Luo Xue) sister (Luo Yu) also fell in love with the same person. How will the two sisters compete for that man, and what will they do?