Set in the year 2019 in Japan. In order to crack down on free expression, a new law is passed, which allows for the government to create an armed force to find and destroy objectionable printed material. Meanwhile, to oppose this oppressive crackdown, the Library Force is created. The Library force, including instructor Atsushi Dojo and Iku Kasahara, work to protect the libraries. A fierce battle then ensues between these two groups.

Michiko Oshitani, who lived in Shiga Prefecture, is found dead at an apartment in Tokyo. She was strangled to death. Mutsuo Koshikawa is the owner of the apartment and he goes missing. Detectives including Yuhei Matsumiya who is a cousin of Detective Kyoichiro Kaga , have difficulties in solving the case. They can't find a connection between Michiko Oshitani and Mutsuo Koshikawa. They soon learn that Michiko Oshitani came to Tokyo to visit Hiromi Asai . They graduated from the same school, but there isn't a connection between Hiromi Asai and Mutsuo Koshikawa. Detective Yuhei Matsumiya finds something near Michiko Oshitani's body. That something has the names of 12 bridges surrounding the Nihonbashi area of Tokyo. Detective Kyoichiro Kaga learns of the clue and becomes agitated. There's a connection with his late mother

Three patients of different backgrounds, illnesses and stages are being treated at a psychiatric clinic in Nagano Prefecture. Their cases range from the criminal to merely asocial. That should be that, but soon matters take a darker turn when a corpse turns up and a murder has occurred. The culprit fingered is one of the patients.