A runaway game begins, and Holmes and Sophie are transported to London surrounded by dark fog years ago, where they are shocked to discover that the game's level is set in a time that Holmes knew all too well from in Conan Doyle's novels.

At the time of entering the game, Holmes is found lying on the boat of his residence on Baker Street. At first, Holmes thought he had a dream, he dreamed that he had gone back 200 years, when he saw flying iron birds in the sky, trains no longer smoked, and he didn't even have to go to the theater to watch a play, but to a screen that glowed. In that dream, he also met a woman named Sophie, who helped her solve many difficult cases.

Sherlock Holmes opens his eyes, only to find that his assistant Watson has become Sophie, and he realizes that he is not dreaming, and that it is all just a virtual game. Because the appearance of "Noah" cut off their contact with the outside world, they do not know what is happening in reality.

Sherlock Holmes and Sophie do not trigger the game quest at first, and return to their own world, and Holmes enthusiastically acts as a guide for Sophie, taking her on a tour of 19th-century Conan Doyle's foggy capital.

But in the end, trouble came to the door, a horrific murder occurred in London, and Scotland Yard detective Rex remembered his "old friend" Sherlock Holmes in desperation.

It was a serial murder case, the first of which occurred more than a month ago, when the original victim was found in Whitechapel in London's East End, the deceased was Martha Tabrien, a middle-aged prostitute, who had been stabbed thirty-nine times, nine of which were slashed in the throat. Half a month later, another prostitute, Marie Nicholas, was found dead in the cantonment area near Whitechapel at the age of 43.

Not only was she bruised on her face, some of her front teeth were lost, and her neck was cut twice. But the most cruel thing is that the abdomen was dissected, the intestines were dragged out, and the female vagina was also severely stabbed with a sharp blade. Since homicides occur in the vicinity of the church, the two cases have caused panic among local residents. The police had no clue after investigating the scene. Only by putting more plainclothes detectives on patrol in this area has the local population organized patrols to maintain law and order.

Unexpectedly, the murderer did not stop there, 8 days later. An old coachman who lives at 29 Hamberning Street found the body of a woman, Anne Chapman, a 47-year-old prostitute, in the back fence of his cheap rental apartment. Like the previous deceased, she had her throat slit and had her intestines thrown onto her right shoulder. Part of the uterus and the flesh of the abdomen were cut off by the murderer. It has obvious strangulation marks on its neck, and it is said that he called for help before his death, but it went unnoticed.

Over the course of more than a month, three people were killed one after another, all of whom were prostitutes. Moreover, the killer's killer methods are extremely cruel, Rao is Sophie is used to seeing all kinds of murder scenes, and her stomach can't help but roll when she listens to Rex's description of the case.

After listening to the description of the case, Holmes quickly came to the characteristics of the suspect: from the point of view of the criminal's method of killing, he must have considerable knowledge of anatomy. Considering that the environment at that time was outdoors, there was basically no lighting, and the criminal completed the crime in an extremely stressful time when he had to be vigilant about his surroundings at all times, it is certain that the other party was a skilled knife user.

All three victims were stabbed from left to right, suggesting that the offender was most likely not left-handed. Or be able to use a knife with both hands. This speculation indirectly indicates that the offender was most likely an experienced doctor or anatomist. And according to the goals of the criminals. Sherlock Holmes also concluded that the other person had a low social presence, was unobtrusive, and may have sexual dysfunction.

After listening to his analysis, Rex fell into deep thought, apparently he had found some clues from Holmes's judgment to solve the case, but Holmes deduced only some vague features. Finding the real criminals in the vast crowd of London is tantamount to looking for a needle in a haystack. …,

Sophie, on the other hand, discovers a surprising truth from Sherlock Holmes' reasoning, the case they encountered. It is the same as the murderous experience of the most notorious killer in European and American culture, "Jack the Ripper". Sophie is keenly aware that the game is likely to set them up to solve the murder of "Jack the Ripper".

Sophie told Holmes about her discovery. And predicted the next move of "Jack the Ripper". Sure enough, the Central News Agency soon received a letter written in red ink and stamped with fingerprints, signed "Jack the Ripper". The letter jokingly stated that he was the murderer of the prostitute and claimed that he would continue to kill more prostitutes before being arrested.

This confirmed Sophie's judgment, but her mood became very depressed as a result. "Jack the Ripper" is the most famous headless case in history, "Jack the Ripper" wrote many public letters to provoke during the crime, but he never fell into the legal net. His bold modus operandi was repeatedly exaggerated by the media and caused panic in British society at that time. Although the period of the crime has been committed for 100 years, the number of books and related studies on the case has also increased. However, due to the lack of evidence, there are different accounts of who the murderer is, and there is no intersection, which makes the case even more confusing.

Even if she was able to grasp the next plan of action of "Jack the Ripper" in advance, Sophie was not sure that she would be able to catch the other party. Because the place of the crime is mainly concentrated near the Whitechapel in London's East End. At that time, it was a well-known settlement for immigrants in London, with tens of thousands of immigrants from Russia and Eastern Europe settling here. With meager incomes, it has long been a hotbed of poverty and crime, and the streets are filled with homeless hooligans and soliciting prostitutes.

Although Scotland Yard established a city-wide patrol network in 1829, the weak police force could not afford to keep the East End crowded with tens of thousands of prostitutes every night. With no camera surveillance, no fingerprint recognition, no DNA identification, Sophie has no confidence in solving the case.

The most important thing is that the game designer does not know the true identity of "Jack the Ripper", which greatly increases the uncertainty of the murderer, and it is not ordinary to find the murderer set by the other party from the fog of history.

Sherlock Holmes didn't want Sophie to give up, he took out the first time that the two of them worked together to solve that case in reality, high-tech detection technology is not necessarily more effective than personal logical reasoning in many cases, and Holmes is very confident in his ability.

According to Sophie's knowledge of the whole case, they set up an ambush in advance at the place where Jack the Ripper's next target was killed. Elizabeth Stude, a 44-year-old Swedish prostitute, was indeed attacked by criminals, and the police, who had been lying in ambush for a long time, rushed up and easily subdued the criminals.

"Jack the Ripper" was easily caught, Sophie always felt that something was wrong with this matter, and Holmes also sensed the problem, and the criminals who were caught were definitely not the real culprits they wanted to catch.

Holmes and Sophie both thought of what might well be a ploy by the criminals, and just as a large number of police officers arrived at the scene of Elizabeth Steder's crime, around 1:45 a.m., Catherine Edaus, a 46-year-old prostitute, was found lying dead in Bishop's Square. In addition to being cut out of her throat and disemboweled, and her intestines were thrown to her right chest, she was also robbed of part of her uterus and kidneys.

Sherlock Holmes realizes that the "Jack the Ripper" is far more cunning than they thought, and according to Sophie's knowledge of the "Jack the Ripper" case, the murderer will kill one more person and disappear forever, which means that they only have one chance left in their hands.

In view of the failure of the previous operation, Holmes became cautious this time, and he asked Sophie to list all the clues of the entire "Jack the Ripper" case, and on this basis, he carried out careful and rigorous reasoning, and finally found the trajectory of the murderer's crime. …,

After a careful planning, a large net of capture was quietly unfolded in the East End of London, and they used the method of "luring the snake out of the hole" to catch the killer who was about to commit the murder, and then subdued the opponent with great difficulty.

Both Holmes and Sophie thought they had finally caught the real "Jack the Ripper", but the next day Scotland Yard received a report that a landlord on Dorsey Street had asked his assistant to go to Mary-Carey's room to collect six weeks of unpaid rent, only to find the 25-year-old young prostitute tragically dead in her bed through the window: she had strangulation marks all over her body, neck, chest and abdomen had been cut open, and the ears and nose of her face had been cut off.

Two consecutive misses made Holmes begin to doubt his own ability, and he even felt that in this virtual game, he was not the omnipotent detective Sherlock Holmes at all.

Sophie said, "If Sherlock Holmes doesn't show up, you are our Sherlock Holmes." There's no case you can't do. Rekindling Holmes's fighting spirit, he locked himself in his room for three days and three nights without closing his eyes, and finally deduced the real murderer, who was about to leave London by train.

During the capture, in order to save the lives of the other passengers on the train, Holmes decides to die with "Jack the Ripper", and they win the computer as long as Sophie is alive. Sophie, on the other hand, felt that there was no need for Sherlock Holmes to sacrifice himself, because the lives in the game were all virtual, and the lives of those passengers were nothing more than a pile of cold data in reality.

Insisting that life in the game is equally worthy of respect, Holmes resolutely jumps off the train. After the virtual game was cleared, Sophie woke up from the game pod, and the other players also walked out of the game pod, except for the game pod that Sherlock Holmes entered without any reaction. (Your support is my biggest motivation.) )