Eccentric consulting detective Sherlock Holmes and Doctor John Watson battle to bring down a new nemesis and unravel a deadly plot that could destroy England.
In 1947, long-retired and near the end of his life, Sherlock Holmes grapples with an unreliable memory and must rely on his housekeeper's son as he revisits the still-unsolved case that led to his retirement.
The famous Borgia Pearl, a valuable gem with a history of bringing murder and misfortune to its owner since the days of the Borgias, is brought to London, thanks in part to Sherlock Holmes.
Having once again avoided criminal conviction, Professor Moriarity develops a murderous plan to “finish off” his last major nemesis, Sherlock Holmes, by making him fail to prevent the perfect crime.
Sherlock Holmes has retired. But when MacDonald asks him to take on another case, he says yes. There have been some mysterious murders, and there are no visible causes for the deaths.
Holmes and Watson board a passenger train bound from London to Edinburgh, to guard the Star of Rhodesia, an enormous diamond worth a fortune belonging to an elderly woman of wealth; but within the first hour of the trip, the woman's son is murdered and the diamond stolen and any of the passengers in their car could be the killer thief.
In the midst of World War II, Sherlock Holmes rescues the Swiss inventor of a new bomb-sight from the Gestapo and brings him to England, where he quickly falls into the clutches of the evil Professor Moriarty.
The Good Comrades are a collection of varied gentlemen who crave one thing - solitude. They reside at Drearcliff House, ancestral home of their eldest member.
A poor family, suffering from a lack of food, plan to sell their dog to gain some extra income. Before they act on their plan, the dog discovers some buried jewels.
The first scene shows part of Flint's old pirate crew, with one-legged John Silver in the lead. They have discovered the hiding place of Billy Bones, the mate of Flint's ship, the "Walrus," and they send Black Dog, one of the crew, to tip Billy Bones to the "black spot" at the Admiral Ben Bow Inn; but Billy Bones drives Black Dog away, and will have nothing to do with him.
The young hero, Frederick, is leaving his country home and going to the city to attend the bull fight, and while there he meets and woos a beautiful maiden, forgetting his own little sweetheart at home.