
A series of seemingly unrelated events begin to shake the world: in India, a powerful cotton magnate falls from grace following a scandal; in China, an influential opium trader dies under suspicious circumstances; bombs explode in the European cities of Strasbourg and Vienna; and in the United States, a wealthy steel tycoon suddenly passes away. While public opinion and international authorities view these incidents as isolated occurrences, renowned detective Sherlock Holmes, portrayed by Robert Downey Jr., sees beyond appearances.
For Holmes, these events are part of a complex and sinister web. Behind each incident lies a pattern—an underlying logic—that all points to a single figure: Professor James Moriarty, brought to life by Jared Harris. Cold, brilliant, and utterly ruthless, Moriarty weaves an intricate network of crimes and conspiracies with an even darker purpose that Holmes is only beginning to uncover. Moriarty is not just a criminal mastermind; he is a strategist who understands the rules of power and knows exactly how to twist them to his advantage.
The investigation drives Holmes to venture far beyond the foggy streets of London. Accompanied by his loyal friend and colleague, Dr. John Watson (Jude Law), the detective is forced to leave his familiar surroundings and dive into a European landscape that transforms into a giant chessboard for the secret war unfolding. From the boulevards of Paris to the landscapes of Central Europe, each clue brings them closer to Moriarty and his diabolical plan.