A young lady, Miss Mary Morstan, contact Sherlock Holmes for his help regarding her father, captain Morstan, who disappeared 10 years ago. Since his disappearance she annually receives a valuable pearl by post from an unknown person. The mystery leads Holmes and doctor Watson into an intricate plot regarding a lost treasure belonging to four convicts on the Andaman Islands.
The Sign of Four
The disappearance of a young woman's father and a mysterious note years later after the strange regular annual delivery of valuable pearls to her puts Sherlock Holmes on the case.
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