This drama tells the story of the humane detective Showa and the ruthless detective Reiwa, who challenge a long-unsolved incident that is actually on hold.The generation gap partner between Showa detective Chiju Tobi, played by Sorimachi, and Reiwa detective Fuwa Riki, played by Sugino, will rely on some clues to get closer to the truth of the incident that is about to be revealed.

Episode 1

Chiju Tobi (Takashi Sorimachi) was originally a shrewd and passionate detective with keen insight and adaptability, but due to a certain incident, he was demoted to the Special Investigation Information Management Office of the 1st Investigation Section of the Metropolitan Police Department, commonly known as “Okura”.This department is mainly responsible for inputting huge amounts of data related to unresolved incidents. Although it has investigative powers, it is also known as the "Graveyard of Criminal Police" within the Metropolitan Police Department.

In addition to Senju, the department also includes Rinko (Mai Shiraishi) who once worked in the Organized Crime Countermeasures Department, Taizo Washizawa (Takeji Ukaji), a veteran detective who is about to retire, the head of the department who likes to gamble, Gakuta Oda (Jun Hashimoto),Ex-father A. Kiri Makihara (Sayaka Aoki) and hacker Ray Yoshioka (Washiro Maeda) who was active in the cybercrime countermeasures room.The Intelligence Management Office welcomed a new member, Fuwa Echi (played by Sugino Haruka) today.Although Riji is known as an excellent detective, he seems to be assigned to Okura for some reason. Kiri and Lei are curious about him.

At the same time, the Intelligence Management Office received an email.The sender was Shusaku Yasuge (Daisuke Kuroda), the suspect in the murder of an elementary school student that occurred 12 years ago. At that time, he could not be arrested due to insufficient evidence.Since the message was sent by the suspect himself, Okura members started talking about it.Qianju, who was in charge of the investigation of the incident at the time, went to the forest where the victim's body was found with Riji and Renzi...

Episode 2

Affiliated to the Special Investigation Information Management Office of the 1st Investigation Section of the Metropolitan Police Department - Chiju Tobi (Takashi Sorimachi) and Fuwa Roshi (Haruo Sugino), commonly known as “Okura”, received new information.In 2013, the death of student Tadashi Michio (Sakishu Urakami) at Orange East High School was not a suicide, but a homicide caused by bullying.

After hearing the news, Yoshioka Ray (Maeda Wangshiro) revealed that he was also a graduate of Orange East High School, and Michio was his classmate.According to Yoshioka, Michio was unable to adapt to school life and always kept to himself. Therefore, he was targeted by Takahiro Oikawa (Yudai Toyoda) and Kota Iwabuchi (Ryosuke Maki) of the delinquent group, and suffered long-term bullying.Ling.

After the incident, other students led by Yoshioka revealed the fact that bullying did occur in a questionnaire survey conducted by the school.However, the Education Committee stubbornly denied the existence of bullying and concluded that % committed suicide because of worries about his future.Senju was responsible for the investigation of the incident together with the head of the First Investigation Section, Hideo Kasaki (Shunsuke Nakamura), but due to some kind of pressure, the investigation was suspended.

Qian Ju decided to investigate the case thoroughly with Yuki Renko (Shiraishi Mai) and Yoshioka.Although there was a lack of clues, Riji decoded a certain code from the data and intelligence at the time...