Saoe narrowly escaped after nearly being killed by a stranger, but she had no idea why he had tried to murder her. After investigating, the police found a notebook left behind by the man and discovered that he was most likely the culprit behind a series of random murders. Saoe, his final target, was the only one to escape. From then on, the killer's whereabouts remained unknown.
I can only say that it's quite fascinating.
She was simply going crazy.