When Sherlock Holmes receives a bloodstained map pointing to a secret island, he and Dr. Watson embark on a deadly mission to expose a global criminal organization known only as The Ghost Line. The island, codenamed Powerland, hides not just elite assassins and spy technology, but the headquarters of a plan to replace world leaders with mind-controlled replicas. Haunted by a ruthless enemy called The Powerland Agent, hunted by double agents within British Intelligence, and betrayed by the very institutions he once served, Holmes must unravel a global conspiracy stretching from London to volcanic catacombs beneath the Atlantic. Blending detective mystery, spy thriller, and international espionage, this gripping tale plunges Holmes into his most dangerous case yet—where the enemy wears many faces, and even the truth can be a weapon. Perfect for fans of Sherlock Holmes thrillers, spy novels, and crime mystery books with a high-stakes, modern twist.