When Dr. Indiana Jones - the tweed-suited professor who just happens to be a celebrated archaeologist - is hired by the government to locate the legendary Ark of the Covenant, he finds himself up against the entire Nazi regime.
Set during the period of growing influence of the Indian independence movement in the British Raj, the story begins with the arrival in India of a British woman, Miss Adela Quested, who is joining her fiancé, a city magistrate named Ronny Heaslop. She and Ronny's mother, Mrs. Moore, befriend an Indian doctor, Aziz H. Ahmed.
For years after her father's disappearance, the beautiful Miss Mary Morstan receives anonymously every year one large and valuable pearl. When, finally, an invitation arrives to meet the mysterious pearl-giver, Mary Morstan seeks Holmes's advice, and he begins to unravel some remarkable clues, including a poison dart and a man with a wooden leg. What Holmes finds is an old soldier who is determined to punish those who betrayed him and his friends by stealing their oriental treasure.