The Strange Case of the End of Civilization as We Know It

During a goodwill tour of the Middle East, Dr. Gropinger misplaces his diary, triggering a panic over which country he will land in. He boards a private aircraft, steps off at the destination, and greets a congregation in Hebrew before being shot dead.

The U.S. President receives a threatening letter signed Moriarty claiming responsibility for the murder and promising world domination. He dispatches a top agent to London to coordinate with international law enforcement to devise a strategy against Moriarty.

An incompetent English-led committee decides to recruit Arthur Sherlock Holmes and the descendant of Dr. Watson, who is a medical doctor but an utter fool, to lead the search for Moriarty's successor. The unlikely duo is tasked with halting Moriarty's plan.

The Commissioner is murdered while attempting to depart, and his death is largely attributed to Watson's rampant stupidity. Holmes and the remaining officials must cope with the loss of leadership.

Holmes and Watson travel to Scotland Yard to discuss the situation with the committee. Before any plan can be made, most of the committee members are murdered by a sniper, leaving them without guidance.

With the committee decimated, Holmes devises a plan to invite the world’s great detectives to a party, hoping Moriarty cannot resist attacking them all at once. Detectives such as Sam Spade, Columbo, and Hercule Poirot attend, while Holmes and Watson work on a crossword.

During the party, the murderer is revealed to be an exact doppelgänger of Watson, creating confusion about who the real Watson is. Holmes struggles to determine who is authentic as the deception unfolds.

After a clever deduction, Holmes identifies the real Watson, and the doppelgänger is revealed to be Moriarty's grandchild—Mrs. Hudson, Holmes's landlady. The revelation reframes everyone’s motives and loyalties.

Holding Holmes and Watson at gunpoint, Mrs. Hudson explains her long simmering vendetta to destroy civilization as payback for Moriarty’s death and prepares to enact it.

Mrs. Hudson shoots Dr. Watson, then proceeds to test Holmes with an onslaught of bullets. Watson dies as Holmes pretends to face a fatal barrage.

Holmes gloats after the assault, only to learn from Watson that he forgot to switch the bullets to blanks. Holmes realizes the attack was real and that he has been shot in earnest.

In the final twist, Holmes dies from the real bullets, concluding Moriarty’s scheme and leaving Mrs. Hudson's vendetta unresolved. The world is spared for now, at the cost of Holmes's life.