In a London shrouded in fog and crime, the legendary detective Sherlock Holmes finds himself trapped in a spiral of cocaine addiction, distorting his brilliant mind and pulling him away from his vocation. His friend and loyal companion, Dr. John Watson, concerned about his state, decides to intervene and seek help. Watson learns of a renowned Austrian doctor, Sigmund Freud, whose innovative approach to psychotherapy could free Holmes from his dependency.
Together, Watson and Holmes travel to Vienna, where they embark on an unexpected journey. Freud, portrayed with a flickering spark between seriousness and humor, attempts to unravel the complexities of Holmes's mind, but they soon become embroiled in an intriguing case that reduces the time available for therapy. The plot thickens when a series of mysterious murders shake the world of high society, and Holmes cannot resist the call of duty.
Chasing clues and confronting a conspiracy that threatens the European nobility, the line between madness and lucidity dangerously blurs. Amidst all this turmoil, old secrets are revealed, the friendship between Holmes and Watson is put to the test, and Freud proves to be more than just a doctor; he becomes an essential ally in the quest for truth. With a perfect blend of humor, suspense, and drama, the story explores the human mind as the famous detective struggles for his redemption.