The beautiful and willful rich girl Yang Xiaoxiao (played by Qiu Si) received an admission letter from Harvard University in the United States. She ignored her father's dissuasion and insisted on attending the celebration party organized by her classmates at school. That night, when lightning and thunder roared, Xiaoxiao was called to the top of the dormitory by a text message, and witnessed the tragic scene of Wang Kexin (played by Li Xincong), a classmate with excellent character and academic performance but mediocre family background, jumping off the building and committing suicide in a red dress. Two years later, Xiaoxiao returned to China after completing her studies and lived alone in a villa according to her father's arrangement. However, the tragedy of that year left an indelible memory in her heart, and she was still troubled by various hallucinations and auditory hallucinations from time to time. During this period, she reunited with Kexin's boyfriend Xue Lin (played by Zhou Kaiwen), who had become a psychologist, and from time to time she found that there was always a girl who looked very similar to Kexin roaming around. Kexin's death hid countless secrets, and now everything will be revealed to the world...