Split personality is a disorder that lies between psychopathology and psychology. For someone with split personality, things done by another personality will not be known to the owner. Ye Xin is a top student in criminal psychology. She has a beautiful appearance and her intelligence is comparable to that of her beauty. Her father, Ye Jingxiao, is a cardiac surgeon. Her boyfriend, Lin Miao, is a young forensic specialist. Everything around Ye Xin's life seems so perfect. But one day, when it is raining heavily in the middle of the night, a wild dog breaks into the backyard of Ye Xin's old home and digs out human bones. At the same time, Ye Xin receives a letter, warning her that her seemingly perfect life is about to collapse.
