Yuki Koga, whose name was written in "Ura K-sensei" as the criminal who killed his best friend, is cornered and seriously injured. The poster "Anonymous" may be a person inside the police ...? While doubts swirl in the finger murder countermeasures room such as Wataru Manjo (Shingo Katori) , Arisa Serizawa (Mai Fukagawa) newly visits for consultation. It is said that the hoax that the woman in the video that makes the clerk who is burning on the net sit down is Arisa is spreading. Her face photo and work place were also exposed, and it is said that she has been severely accusated by the world.

Homeless murder by high school student Ren Katayama (Yuzu Aoki) ... One month later, lotus's personal information was identified and exposed online, which was a big topic. There are many terrible injuries that are not true, and Lotus' father, Ryotaro (Masahiro Toda), asks the "Finger Murder Countermeasures Office" to catch the criminal who first exposed the information. Wataru Manjo (Shingo Katori) and Sakiyoshi Usui (Nagisa Sekimizu) immediately investigate, but as they investigate their friendships, the true nature of the lotus becomes apparent.

Former idol Mio Makabe (Misato Tanaka) comes to the "Finger Murder Countermeasures Room" with her husband Seiji (Kazushige Komatsu). Mio has been reported to have an affair with a married man. She gets antipathy from the world and is flooded with her criticism, and at the same time becomes a target of celebrity beating with accusation. Her affair partner was a man I met on a matching app. Information is exposed one after another on the dark site called "Ura K-sensei", and a man who was once arrested for stalking Mio is released and starts to turn around Mio.

A request from the popular video distributor Sawati (Atsushi Hashimoto) to the finger-to-room. It is said that the number of accusations on SNS suddenly increased a month ago, and finally the threat of "dead and apologize" arrived and I was scared. Shuichi Hoshino (Toshihisa Hagiwara), who was exposed to the threatening act and was exposed to a big bashing, loses his place not only in the real world but also in the world of the Internet. However, Shiori Yamana (Riho Sayashi), a librarian who knows Hoshino, says that Hoshino is a good person. Sawati also seems to be hiding something ... Manjo (Shingo Katori) and Sakiyoshi (Nagisa Sekimizu) try to persuade Hoshino, but Hoshino, who has lost his last hope, decides to make the worst choice.

Rumors that Anonymous is connected to someone in the finger room spread inside the police, especially Wataru Manjo (Shingo Katori) is suspected. Kaori Suematsu (Ririka Kawashima), a professional student who suffers from anonymous injuries, comes to such a finger room. It is said that the contents of her e-mail are all the injuries to her lover, Soichiro Nagisa (Taketo Tanaka). During the consultation, Soichiro was abducted and live delivery began in captivity! With the threat of "taking him all" ...

A food company that went up in flames with rumors that it was a black company that forced its employees to commit suicide with power harassment. The SNS will receive a bomb threat saying, "If you don't confess your crime, you'll blow up." Yuhei Koyanagi (Akihisa Shiono), a prophecy found by Wataru Manjo (Shingo Katori) and others, was a believer in Anonymous. Then, a new video will be posted from Anonymous to the back K. "The next accusation is the country's biggest evil and police." Around the same time, Manjo was instructed by the detective director, Akifumi Shirogasaki (Katsumi Takahashi), to find out the true identity of Anonymous

The truth of the incident two years ago when Sena Kuraki (Sim Eun Kyung) , a former partner of Wataru Manjo (Shingo Katori) , fell into a deadly bullet, and the finger-to-member members who arrived at the true identity of Anonymous. However, the runaway of Anonymous, which damages the credibility of the police and advocates the enforcement of justice by collective intelligence, cannot be stopped. While not only the Internet people but also public opinion began to support Anonymous, even the key person to prevent the runaway, Detective Director Shirogasaki (Katsumi Takahashi), disappeared ... The final battle against Anonymous begins!