In half a month, there have been three consecutive homicides in Tokyo, Japan.
They killed in different ways, killing places far apart and without any connection between the dead.
Despite this, the police still determined that it was a serial murder.
Because all three murder scenes left the same digital signal.
Officer Kosuke Nitta decoded the digital codes, and they all showed latitude and longitude information about the location of the next attack.
The fourth murder scene will take place at the Kodi Hotel in Tokyo, Japan.
The police did not allow the killer to escape, and the hotel management did not allow the lives of the guests to be in danger.
The police decided to carry out an undercover search plan for the Kodi Hotel in Tokyo.
All police officers, as hotel service personnel, were stationed at the hotel to inquire about the murderer's plan for the fourth killing.
The hotel's head of department, Sugi, will conduct a systematic staff training for all incoming police officers.
Kosuke Nitta, the only police officer in the police department who could speak English when he returned from abroad, was placed at the front desk.
He had an arrogant attitude and an untrimmed haircut, and was once rebuked and dissatisfied by the front desk staff, Naomi Yamagishi.
In order to carry out his work tasks, Kosuke Nitta had to trim his beard and hairstyle according to Naomi Yamagishi's request, put away his stinky temper when he was a policeman, and stand at the front desk of the hotel.
After graduating from university, Naomi Yamagishi became an employee of the Kodi Hotel Tokyo.
At all times, she is strict with herself and provides perfect service to every guest staying at the hotel.
The mental outlook and attire of a hotel staff has an important impact on the visiting customer.
In order not to let Kosuke Nitta affect the image of the Kodi Hotel Tokyo, Naomi Yamagishi made a comprehensive image transformation of him.
Mr. Furuhashi stayed at the Kodi Hotel Tokyo last month.
When the cleaning staff cleaned the room after he checked out, he found that the bathrobe in the room was missing.
The market value of a bathrobe is 20,000 yuan, and the loss of a bathrobe is not a small loss for the hotel.
When Naomi Yamagishi discovers that the bathrobe in the Furuhashi room is missing again for the second time, she makes a request to search her luggage.
Kosuke Nitta rushed back and stopped her move in time.
There are two bathrobes in the Old Bridge Room, and the one that is missing is not a new bathrobe, but an old bathrobe worn.
Furuhashi stole the bathrobe for the first time only to get the attention of the staff, and when the bathrobe is lost again, the staff will definitely go through their luggage.
Furuhashi could logically use the hotel to check his luggage for no reason, challenge the hotel management, and demand huge compensation costs.
Unsurprisingly, Kosuke Nitta found the bathrobe he had hidden under the mattress in The Furuhashi room.
He used the policeman's exclusive keen insight and analytical power to help the Kodi Hotel Tokyo recover its losses.
Naomi Yamagishi slowly changed her initial impression of the cynicism that Kosuke Nitta had developed.
As soon as Yaoko Katatsuki entered the hotel, Kosuke Nitta became suspicious of her.
He could see at a glance that Yaoko Katatsuru was not a visually impaired person, because the blind person walked on touch and hearing, and would never wear gloves like her.
Although Yaozi looks like a blind person, she does not have the most basic characteristics of a blind person.
She refused Kosuke Nitta's hotel services, and constantly made all kinds of unreasonable demands on the conscientious Naomi Yamagishi.
Naomi Yamagishi, reminded by Kosuke Nitta, also becomes suspicious of Yaoko Katatsuki's strange behavior.
When It was time for Yaoko Kataki to check out, she told Naomi Yamagishi the purpose of her trip.
Her husband is a truly visually impaired person, and on weekends he will be at the Kodi Hotel in Tokyo, where he and a few of his friends will have a party.
Katatori Yaoko is worried that her visually impaired husband will be affected by the hotel's supernatural events, so she checks in early to the Kodi Hotel Tokyo to feel the working attitude of the service staff.
She wore black gloves on her hands because of the ugly scars on her hands that had been burned.
Naomi Kami and Kosuke Nitta let go of their wariness and hostility towards Yaoko Katatsuru and respectfully watched her walk out of the hotel door.
Kenji Kurihara is the third hotel guest to stay after an undercover police search.
As soon as he arrived at the hotel, he was furious at Kosuke Nitta's service attitude.
Immediately after, he was dissatisfied with the landscape environment of the room and repeatedly changed the room.
In the end, he forcibly left Kosuke Nitta in his room on the grounds that the computer data was lost and re-entered the data for him.
In order to supervise Kosuke Nitta, he will communicate with him by telephone from time to time.
Kosuke Nitta had always felt that Kenji Kurihara's face was familiar, but he couldn't think of where the two had ever met.
The police conducted a comprehensive investigation into Kenji Kurihara.
It turned out that Kenji Kurihara had worked as a trainee teacher at the school where Kosuke Nitta attended.
He was repeatedly insulted by students because his spoken English was inferior to Kosuke Nitta, who had experience studying abroad.
Kenji Kurihara was devastated and lost his position as a trainee teacher.
Since then, all the work he has done has not lasted long.
Today, his job offer at the Tokyo Tuition Club has also been lost.
Without a job, Kenji Kurihara had to pack his bags and return to his hometown.
Before leaving, he checked in at the Kodi Hotel Tokyo.
He repeatedly provoked Kosuke Nitta in a vain attempt to ruin his job as a senior manager at the Kodi Hotel in Tokyo after Nitta fought back.
But he failed, and even after such a long time, Kosuke Nitta defeated him so well.
Naomi Yamagishi realizes from Kenji Kurihara's revenge that hotel service staff are likely to be the target of revenge for some resentful guests.
Perhaps in this murder, the real target of the murderer is likely to be the hotel's service staff.
Eriko Anno has already checked in to the hotel.
She showed a picture of a middle-aged man to Naomi Yamagishi at the front desk, hoping that she would refuse the man in the photo to stay at the Kodi Hotel in Tokyo.
During this time, Anno Eriko has been followed by the man in the photo.
Naomi Yamagishi could not refuse the guest's request to stay at the hotel, but she was willing to inform the hotel staff that if the man in the photo stayed at the hotel, they would keep her check-in information for Eriko Anno.
The man in the photo, as Taterin, ordered a room at the Kodi Hotel in Tokyo.
Naomi Yamagishi was very worried about The safety of Eriko Anno and came to the door of her room.
She reminds Anno that Eriko must not go out, especially away from Room 515 on the 5th floor where Mr. Taterin is staying.
Police and hotel management keep an eye on the surveillance footage on each floor.
A young, beautiful, well-dressed woman knocked on Mr. Guan Lin's door late at night.
Naomi Yamagishi immediately realized that she had made a low-level mistake that the service staff should avoid, and she revealed the information about Mr. Tatebayashi's room to Mr. Anno Eriko.
The person being followed was never Anno Eriko, but the unsuspecting Mr. Tatebayashi.
Naomi Yamagishi and Kosuke Nitta rushed as fast as they could to the door of Room 515 on the 5th floor.
The young woman came out of it, and Anno Eriko appeared in Mr. Tatebayashi's room.
It turns out that Anno Eriko and Tatebayashi are husband and wife.
Whenever Taterin comes to Tokyo for business, he will hang out with women outside.
Anno Eriko discovered her husband's abnormality early on, but she struggled to find a single piece of evidence of his cheating.
If she directly showed her intentions to the hotel staff, the other party would definitely not say the room check-in number of Guanlin.
She had to come up with a plan to be followed, and catch the scene of the adulterous husband and lover's cheating on the spot.
She brought the divorce application form, and after this farce, she was truly freed from this tragic marriage.
General hotel staff are not allowed to disclose guest room information to outsiders.
A year ago, Naomi Yamagishi met a more difficult woman.
She must go to her boyfriend's room to surprise him.
When she asked Naomi Yamagishi for her boyfriend's room number, she refused.
The woman immediately decided to check in, intending to enter the hotel and personally look for the boyfriend's housing traces.
Yamagishi Naomi again refused the woman's request on the grounds that the room was full.
Everyone who comes to the hotel is a guest with a mask, and as the hotel's service staff, they can only guess the true face of the guest, but they can't tear off their mask.
Many political commentators or prominent public figures travel by a variety of ways to hide their identities and actions.
Once they enter the Kodi Hotel Tokyo, all staff must ensure that their private information is not leaked.
Hotel guests in order to cover up their travel purposes, do everything possible, then the murderer will not be in order to interfere with the police's thinking, deliberately create the murder, into the illusion of serial murder?
Police have conducted a more nuanced investigation into the first three cases.
On October 4, the first murder occurred in Shinagawa, and the deceased Okabe and suspect Masaki Teshima were partners in the work.
The police found them suspected of running out of public funds.
Although Masaki Teshima was the most suspicious, he provided evidence of his absence.
Masaki Teshima's ex-girlfriend, Hondo Chizuru, was killed in Okabe when she called Masaki Teshima's home.
Masaki Teshima, who was answering the phone at home, could not have come to the scene of Okabe's death in a short period of time.
When Hondo Chizuru called Masaki Teshima, her friend Koyo Inoue was by her side.
The attentive Naomi Yamagishi raised her own questions when she and Kosuke Nitta analyzed the case.
A couple who have been separated for two years, how can the woman call her ex-boyfriend in front of her friends.
This is not only unreasonable, but also somewhat deliberate.
There is only one possibility in this situation that two people still have feelings for each other even if they have been separated for two years.
Her friend Koyo Inoue must have played an instigative role at this time, and it became very suspicious to call the suspect when Inoue instigated Hondo Chizuru to be killed in Okabe.
Hondo Chizuru didn't necessarily actually call Masaki Teshima's house, and Koyo Inoue must have changed the phone number under the note when Hondo Chizuru wasn't paying attention.
After investigation, the police found that Hiroyo Inoue had worked part-time at Okabe and Masaki Teshima's company.
During that time, she and Okabe had an extramarital affair.
Masaki Teshima uses their relationship as a blackmail, making Koshiro Inoue an accomplice in his own killing of Okabe.
On October 10, a second murder occurred in Senju Shinbashi, in which the housewife Noguchi Shiko was killed.
The police eventually determined that the murderer was the husband of the deceased, who had killed his wife in order to defraud him of huge insurance claims.
On October 18, a third murder occurred in Kasai, in which kazuyuki, a college teacher, was killed by his own students.
The same digital information was left at all three murder scenes because the three murderers conspired to confuse the police through the Internet.
A fourth homicide will take place at the Kodi Hotel Tokyo, which will be directed either to the hotel staff or to the hotel's check-in guests.
This meant that the Kody Hotel Tokyo was even more dangerous than they had initially anticipated.
Naomi Yamagishi overhears Kosuke Nitta's conversation with her colleagues, and she can't ignore the safety of all the guests and hide the arrest of the police.
But once she makes public the police's case plan, the arrest of the murderer will also be ruined.
The wedding reception of Mr. Matsuda and Miss Takayama will be held at the Kodi Hotel tokyo.
Miss Takayama had just checked in when she received a bottle of red wine injected with poison.
Before the wedding feast, Takata Yoshiko found herself being snooped on.
Some of her letters were missing, and some had been opened.
To this end, she reported it to the police station, and the police, after investigation, had no clue about it.
Kosuke Nitta's former partner Noh discovers a murder in which the deceased also died of poison injection.
The deceased Takashi Matsuoka, 24, was a new actor. Last November, he came from Nagoya to Tokyo for an interview with a famous theater company, and that night he stayed at the Kody Hotel, and his ankle also had marks of a needle.
Noh went to the Nagoya Small Theater where Matsuoka used to work.
He took a photo of a troupe performance that Matsuoka had participated in.
In the group photo, Kosuke Nitta saw Yaoko Kataki, dressed as an old woman.
All the police officers focused on the wedding scene of Yoshiko Takayama.
Katatsuru took the opportunity to check in at the Kodi Hotel in Tokyo, and she called Naomi Yamagishi to one of the rooms she had booked.
Asuka Nagakura is Matsuoka's senior in the troupe, and the two become boyfriend and girlfriend after getting along.
Nagakura Asuka became pregnant with Matsuoka's child, and Matsuoka abandoned her to tokyo because he wanted to become an actress.
Nagakura Discovers Matsuoka's whereabouts at the Kodi Hotel in Tokyo, and she tries to enter the hotel to look for Matsuoka, but is refused by Naomi Yamagishi.
Fearing that Matsuoka would escape again, Nagakura Braved heavy rain all night and stood guard at the door of the Kodi Hotel in Tokyo.
The next day, Matsuoka checked out and left the Kodi Hotel Tokyo.
Nagakura Asaki stood up and tried to catch up with Matsuoka, but he fainted due to lack of physical strength.
When she woke up, she had been taken to the hospital, but the baby in her belly had also been miscarried after a night of rain.
The idea of killing Matsuoka and Naomi Yamagishi kept Nagakura Asuka alive.
She stole a muscle relaxant that left no trace from the veterinary clinic where she worked, and she teamed up with other perpetrators online to create the murders.
After hearing that Naomi Yamagishi had been called away by Yaoko Kata kiri, Kosuke Nitta inquired about the four rooms she had booked one by one.
Yamagishi's serious work attitude eventually saved her life.
She could not tolerate the slightest flaw in the hotel room, and all items marked with the hotel badge had to be properly arranged.
Kosuke Nitta guessed the exact location of the suspect from the upside down hotel sign.
The murder was solved, and Kosuke Nitta resumed his police attire.
At this moment, in his heart, in addition to the uniform of the waiter, there is also Naomi Yamagishi who often stands by his side to support him.