- Detective Tsukiko Otonashi (Masami Nagasawa), who went to America to work with the FBI, returns to Japan. She's back in her native country to take part in a symposium on an urban legend related to Mount Fuji. The symposium takes place at the foot of Mount Fuji. There, Shigeharu Take (Masato Ibu), who is now the police commissioner, arrives. He states that he will create an investigation team "UIU" to solve cases related to urban legends. Ichio Tannai (Naoto Takenaka) is appointed the team leader of UIU. Detective Tsukiko Otonashi will work as a permanent member of UIU.
On the morning of the symposium, researcher Shuji Nakano's (Ryo Segawa) body is found next to Lake Motosu. Shuji Nakano was scheduled to make a presentation regarding Mount Fuji. Near his body, traces are left that his body was dragged there. Also, a mysterious red ancient letter is written on Shuji Nakano's palm