The story of Season 23 begins with Ukyo accepting instructions from his superiors to compile the 150-year history of the Metropolitan Police Department.

In the 7th year of Meiji, the Metropolitan Police Department was founded by the former Satsuma feudal lord, Kawaji Toriya.Together with the Secretary of the Interior, Toshimichi Okubo, he founded the police agency and became the first-generation police chief (currently the police chief).However, Okubo later suffered the tragedy of assassination——.Like that incident in the dawn of the police, there was an incident where a big shot politician was killed!What stands in the way of the Tomei-kei who begin the investigation is the reality of the widening gap between rich and poor in modern Japan, as well as the ambitions and conspiracies of powerful people spreading in the political world -!?

150 years ago and now——As society changes, has “Justice” also changed...!?​

When Ukyo (Yutaka Mizutani) was appointed to summarize the 150-year history of the Metropolitan Police Department, House of Representatives member Ashiya (Shiro Namiki) was killed.Ukyo and Kaoru (Terawaki Yasufumi), who rushed to the scene quickly, watched the search operation of the first section.

On the other hand, this incident also caused a chain reaction in the political arena.For Tonegawa (Ogata Yoshihiro), known as the “Shadow Prime Minister”, this is the perfect opportunity to abandon Prime Minister Fujiwara (Shiba Toshio) whose support rate is low.When the head of the internal affairs investigation department, Kamiko Kamiko (Yukie Nakama), got the news, Fujiwara was forced into a corner and could not hide his shock.

Ukyo and Kaoru met unexpected characters while pursuing clues at the scene.He is the young man Takada Hajime (Kato Kiyoshiro) who once met Ukyo through other incidents and received Ukyo's help to move towards a new life. Takada Hajime is currently working as a police officer in the local affairs department. He noticed a suspicious person nearby and began to follow him.investigation.

After receiving the clues provided by Takada, Ukyo and Kaoru split up and continued to track the incident.During this investigation, Takada had a good relationship with his senior Nishina (Kenta Uchino), who was also on the same duty, and gradually showed the style of a police officer.However, events began to develop strangely afterwards.About 150 years ago, Minister of the Interior Okubo Toshimichi was assassinated. The historical cases of that year and the current emergency situation are actually highly restored...!

Behind the murder of the congressman is the ambition and conspiracy of the powerful!?

Prime Minister Fujiwara (Toshio Chai) was attacked by a remotely controlled bomb.This unpredictable event is closely linked to the previous killings of congressmen, and people can't help but think of the historic events of 150 years ago, when Okubo Toshimichi and Ito Hirobumi were assassinated one after another.

However, the police could not even determine the real target of the murderer.On the other hand, Ukyo (Yutaka Mizutani) who rushed to the scene noticed from the traces on the scene that the terrorist operation may have used black market labor.His reasoning is accurate, and as the clues are followed, it gradually becomes clear that there is a character deeply involved behind the series of events.The police advanced the investigation along this clue, but Ukyo felt a little violated.

At the same time, Ukyo and Kaoru (Terawaki Yasufumi) visited the police station where Takada (Kato Kiyoshiro) worked. Takada asked them to accompany them to the crime scene. He hoped to learn Ukyo's investigative techniques personally.They re-verified the scene and discovered unexpected facts from the remaining blood stains.However, just after that, Kaoru and Takada, who were investigating separately, fell into a desperate situation.In addition, there are also unusual trends surrounding Tonegawa (Ogata Yoshihiro), who secretly controls the political world...

This incident will become a major case etched in the 150-year history of the Metropolitan Police Department.

What will be the fate of Kaoru and Takada who fall into a cunning trap?

Ukyo (Yutaka Mizutani) is in a mountain villa where mobile phone signals cannot be covered.The guests who stayed at the hotel included the novelist Kishi (Eri Busse) and his accompanying editor. Counting Ukyo, there were about seven people in total.Judging from the way they spend their days, they seem to be a bunch of weirdos.On the other hand, the hotel owner Kashimura (Fukushi Seiji) appears to be honest and reliable, quietly busy with his work.However, there was a hint of gloom in his expression...

At the same time, Kaoru (Yasufumi Terawaki), who was enjoying a vacation at a hot spring hotel, witnessed a worrying video at the urging of Miwako (Suba Suzuki).The video seemed to accidentally capture a man falling from a building, along with a man who looked like Ukyo.

The next morning, Kaoru gave up the rest of her vacation and returned to work early.He learned that in his absence, Ukyo had assisted in the search operation for D products.When Kaoru visited the house of a suspicious person who emerged during the investigation, he found that the man had died mysteriously.

During this period, ominous events continued to occur in the mountain villa where Ukyo was staying!?

What is the real purpose of Ukyo who is stranded in a mountain hotel?

Xun will follow his footsteps and gradually approach the truth behind the incident.

When the clues are gradually connected, the unexpected truth gradually emerges!

Two bodies were found in the ruined building.One of them, an elderly man entrusted with the care of the building, died from what appeared to be heart failure.The other is a middle-aged man named Ghana (Mamuya Yamaguchi), who has multiple criminal records and the cause of death was strangulation.The police began to investigate whether it was internal strife or murder.However, the situation at the scene was abnormal. For some reason, there were glowing mushrooms growing on Yamaguchi Mamuya's back and the surrounding floor.

Ukyo (Yutaka Mizutani), who was very interested in this scene, and Kaoru (Yasufumi Terawaki) took action together, but the problem was that not only was that mushroom not recorded on the Internet, it was also not recorded in illustrated books, and it was an extremely rare species.In order to search for clues, the two began to visit experts in mushroom research and professional scientists in environmental protection.After listening to what they said, I realized that that kind of mushroom can bring huge economic benefits and is a dream species that has attracted world attention.As the investigation progressed, it was discovered that environmental groups had been formed in Ghana.According to what Aiba (Nakao Masaki) at the telephone exchange said, Ghana seems to have two faces, the outside and the inside!?

There are two faces looming behind the seemingly dead man.