In one of Anderson's boldest imaginings, Sherlock Holmes's %death is portrayed as an elaborate hoax involving masks and the mysterious powers of a hypnotist.However, this compelling theory was ruthlessly dismissed by Inspector Lestrade, who believed that it was simply Anderson's guilt over Sherlock's suicide due to a misunderstanding.However, this is not the case.

During the period when Shylock's life or death was uncertain, his brother Mycroft personally went deep into Serbia and rescued Shylock from the brutal forced confession.Sherlock is told that London's underground network is planning a series of terrorist activities, and he must return immediately to expose and stop these conspiracies.As a result, Sherlock returned to 221B Baker Street with a new identity and determination.

After receiving the news of Sherlock's return, Dr. Watson once again stepped into this place full of memories with mixed emotions.He met Mrs. Hudson. Due to the shock of Sherlock's suicide, Watson still can't let go and even avoids using mobile phones to contact friends.Mrs. Hudson was both happy and sad about Watson's arrival, and Watson also revealed the good news to her that he was about to get married, insisting that he and Sherlock were not in a relationship.

Mycroft decided not to tell Watson Sherlock's true situation for the time being, and even Mrs. Hudson knew nothing about it.Sherlock planned to surprise Watson, so he pretended to be a waiter and appeared in the restaurant where Watson proposed.However, his prank made Watson furious, and the two clashed again.Although Sherlock explained the reasons for his disappearance and concealment of the truth, Watson still found it difficult to accept and rejected Sherlock's invitation to solve the case together.

Having lost his assistant, Sherlock had to find a new one, and Jasmine became his new assistant.However, at this moment, Watson decided to shave off his beard because of Sherlock and Mary's ridicule.However, Jasmine's love affair puts Sherlock into trouble again.

After solving a series of difficult cases, Sherlock began to deal with terrorist attacks in London's underground network.However, while he was going all out, Watson was kidnapped.Sherlock rode his motorcycle and took Mary to the Bonfire Festival and successfully rescued Watson.During the investigation, they discovered a clue provided by a staff member on the train and followed the clues to reveal the conspiracy of the subway case.

In an abandoned subway tunnel, Sherlock and Watson discovered a large number of bombs.However, at this moment, the bomb was activated remotely.Although Sherlock claimed that he could not defuse bombs, his ingenuity successfully prevented the bomb from exploding and prevented Big Ben and members of Congress from being attacked.

Sherlock found Anderson and explained to him his original plan to successfully escape.Although Anderson remains skeptical, Sherlock's determination and intelligence have won him over.The murderer of the subway case was arrested, but Sherlock knew there was a bigger conspiracy behind it.He plans to continue his in-depth investigation to uncover the truth of all this.